Rolex Zenith Daytona 16520 Overhaul

[jdmi32]

Great pics! Last time I had my 16520 serviced was back in 2004 and it cost about $540. I am not looking forward to the next service.

[RichM]

Great shots Bas. Thanks for sharing.

[jaisonline]

Originally Posted by jdmi32

Great pics! Last time I had my 16520 serviced was back in 2004 and it cost about $540. I am not looking forward to the next service.

It's rough. Ha.

I'm being charged $1,250 for the service. Don't need a new SS crown which surprised me as Rolex always required me to get a new one in the past (every watch). They said the crystal is also required to be replaced for $100.40 (SAPPHIRE CRYSTAL D29.5 1.8 & GASKET) .

I optioned a replacement bezel for $230 (16520 400-TAC ST) only since they approved mailing back the my SS original which is an earlier Mark. Looks to be the same bezel as on 116520s as they were shared. Also wanted an extra link for $65 (EXTENSION LINK 78390 16 ST). I was told the crystal will be one w/o the nearly invisible etched logo and the link will be a hollow centered link version. No idea if true but we'll see.

Yeah, it's a costly service but not sure when it was ever serviced since being purchased in early 2000. Plus, it's something I can never do myself :)

[037]

Originally Posted by SearChart

Lol yes, I had to replace about 90% of the screws due to damage from a previous watchmaker, the 4030 has so many different screws, you don't want to mix them up

Ha, yeah, I figured you weren't the culprit. I guess the last watchmaker didn't think anyone else would see his work.

[antoflo]

Beautiful pictures, one of my favorite Daytona !

[SearChart]

Thanks a lot everyone!

I enjoy sharing these mechanical pieces of art with all of you

Originally Posted by FTX I

Awesome. Glad to see you posting again after a short break my friend.

Thanks buddy

Originally Posted by kauebm

These threads by Bas are some of the best stuff we find on TRF these days. Thanks!

Thank you for your kind words.

Originally Posted by Johny

Great thread. Thank you for posting Bud.

Cheers bud

Originally Posted by Rolex addict

Very cool!! Glad to see you working on chronographs now. Moving on up the ladder!!

Originally Posted by 037

Ha, yeah, I figured you weren't the culprit. I guess the last watchmaker didn't think anyone else would see his work.

Some are just oblivious. You see damage on screws like this several times a week, sometimes even when the previous service was done by an RSC.

Trust me, if you do that during a Rolex training you will hear about it.

Maybe because I'm still young and have only done this for a few years is why I care, and when I'm old and close to retiring I will damage screws as well

[SeikoBake]

Thanks so much for sharing. I love those inverted sixes

[roystrex]

Excellent shots.
Mine is also at London service, shall I receive pictures too, or I should ask?
Thanks in advance.
P.S. my estimate was £1,274,40 and will be ready in 6-7 weeks

[brandrea]

Awesome Bas I always enjoy your posts showing us the inner workings

[SearChart]

Originally Posted by roystrex

Excellent shots.
Mine is also at London service, shall I receive pictures too, or I should ask?
Thanks in advance.
P.S. my estimate was £1,274,40 and will be ready in 6-7 weeks

I'd call and ask for some pics

Originally Posted by brandrea

Awesome Bas I always enjoy your posts showing us the inner workings

Thanks! And always a pleasure to posts these

[037]

Originally Posted by SearChart

Maybe because I'm still young and have only done this for a few years is why I care, and when I'm old and close to retiring I will damage screws as well

Watchmakers never get old, they just lose more screws.

[subtona]

Great stuff Bas.
The white dial zenith is one of my favorites.

Also curious what separates this movement from the modern in-house?
Easier or more difficult to overhaul and regulate for example?
Consequence of Longer or shorter service intervals between the two?

Thanks for the pics and info.

[SearChart]

Originally Posted by 037

Watchmakers never get old, they just lose more screws.

I already spend too much time looking for stuff on the floor

[spoilsofwar01]

Hey Baz nice work , don't get me wrong however I'm not a fan of the Rolex Daytona, (for me) the case is way to big and the dial not so easy to read .... But wow, the photo of the dial minus the case and the movement left me thinking this is an awesome piece of horology.... am I convert in the making

[RHIII]

Fantastic pics!

[SearChart]

Originally Posted by subtona

Great stuff Bas.
The white dial zenith is one of my favorites.

Also curious what separates this movement from the modern in-house?
Easier or more difficult to overhaul and regulate for example?
Consequence of Longer or shorter service intervals between the two?

Thanks for the pics and info.

Thanks Gus

They're completely different from the ground up.
The 4030 is very traditional with a base movement and then on top the integrated chronograph mechanism, classic clutch. When assembling it is all very logical.
It is not in-house, but it definitely differs greatly from the original Zenith movement on which it is based.

The 4130 makes no sense if you're you only have experience with traditional chronograph movements, when assembling the base movement you already need to place quite a few chronograph parts, and the vertical clutch is just so Avant Garde. The 'playless' gears are also amazing. It is a real mechanical marvel and it works very well.

In the end the two movements do the exact same thing and an oblivious wearer couldn't tell a difference. Yet the 4130 is so much more efficient, accurate and has a longer power reserve.

As for service intervals, both are very solid and can easily run 8-10 years in between service.
The service cost for the 4030 is higher because not every RSC watchmaker is allowed to work on them, and parts are not produced as much as modern movements anymore.

[SearChart]

Originally Posted by spoilsofwar01

Hey Baz nice work , don't get me wrong however I'm not a fan of the Rolex Daytona, (for me) the case is way to big and the dial not so easy to read .... But wow, the photo of the dial minus the case and the movement left me thinking this is an awesome piece of horology.... am I convert in the making

Originally Posted by RHIII

Fantastic pics!

Thanks Roger!

[flatwhite]

Thanks for sharing. Beautiful shots and watch!

[subtona]

Originally Posted by SearChart

Thanks Gus

They're completely different from the ground up.
The 4030 is very traditional with a base movement and then on top the integrated chronograph mechanism, classic clutch. When assembling it is all very logical.
It is not in-house, but it definitely differs greatly from the original Zenith movement on which it is based.

The 4130 makes no sense if you're you only have experience with traditional chronograph movements, when assembling the base movement you already need to place quite a few chronograph parts, and the vertical clutch is just so Avant Garde. The 'playless' gears are also amazing. It is a real mechanical marvel and it works very well.

In the end the two movements do the exact same thing and an oblivious wearer couldn't tell a difference. Yet the 4130 is so much more efficient, accurate and has a longer power reserve.

As for service intervals, both are very solid and can easily run 8-10 years in between service.
The service cost for the 4030 is higher because not every RSC watchmaker is allowed to work on them, and parts are not produced as much as modern movements anymore.

Thanks Bas for the education, meaningful distinctions between the two movements. As you say each will get you where you’re going in style.

[juve]

Nice photo , thank you for sharing.

[watchmework]

So cool...thanks for sharing these with Bas, it’s nice to see some of the inner workings of these beauties.

[jaisonline]

Hey Bas.

I own a Tudor 79280 with the Valjoux 7750 and a Daytona with the 4030.

Is it true the newer in-house 4130 puts less wear and tear on its movement running the chronograph a-lot than the movements in my watches?

I read about that somewhere and wanted to see if you can share thoughts on that topic.

Originally Posted by SearChart

Thanks Gus

They're completely different from the ground up.
The 4030 is very traditional with a base movement and then on top the integrated chronograph mechanism, classic clutch. When assembling it is all very logical.
It is not in-house, but it definitely differs greatly from the original Zenith movement on which it is based.

The 4130 makes no sense if you're you only have experience with traditional chronograph movements, when assembling the base movement you already need to place quite a few chronograph parts, and the vertical clutch is just so Avant Garde. The 'playless' gears are also amazing. It is a real mechanical marvel and it works very well.

In the end the two movements do the exact same thing and an oblivious wearer couldn't tell a difference. Yet the 4130 is so much more efficient, accurate and has a longer power reserve.

As for service intervals, both are very solid and can easily run 8-10 years in between service.
The service cost for the 4030 is higher because not every RSC watchmaker is allowed to work on them, and parts are not produced as much as modern movements anymore.

[ratty]

Hi Bas

I think you have said in the past that you were not qualified to work on Daytona’s, obviously that has changed. Can you tell us anything about the extra training required to work on them?

Really interesting thread.

Thanks

[SearChart]

Originally Posted by jaisonline

Hey Bas.

I own a Tudor 79280 with the Valjoux 7750 and a Daytona with the 4030.

Is it true the newer in-house 4130 puts less wear and tear on its movement running the chronograph a-lot than the movements in my watches?

I read about that somewhere and wanted to see if you can share thoughts on that topic.

There's still parts that only wear when the chronograph is activated, but I wouldn't worry about it as these parts are included in the base service cost anyway.
It is made to be used as a tool

[SearChart]

Originally Posted by ratty

Hi Bas

I think you have said in the past that you were not qualified to work on Daytona’s, obviously that has changed. Can you tell us anything about the extra training required to work on them?

Really interesting thread.

Thanks

Just training on the service method, why certain things are done a certain way, etc.

[KeithP]

Amazing, Bas- always appreciated!

[Rokoru]

Great post Bas. Thank you for sharing!

[emtee]

Awesome thanks for sharing. Would love to see one of these for a SkyDweller movement!

[SearChart]

Originally Posted by emtee

Awesome thanks for sharing. Would love to see one of these for a SkyDweller movement!

It'll take a few years before I'm allowed to touch one of those

[micasol]

Awesome and very nice share those pics and job, huge skills and knowledge to work on this movement

Have one and each time looking at I want open it to see and understand how it’s running and compared it 4130 caliber, seems to be really different movement.

4130 is really logical movement for me, first the train wheels and after chrono parts, 4030 seems to be really different.


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