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Patekfinder · 25 January 2024, 06:42 AM

I heard from someone the DD40 case is actually 39mm and not 40mm. Is this true?

TunaTuna · 25 January 2024, 07:20 AM

No then it would be a DD39. You are safe

piratfisk · 25 January 2024, 07:32 AM

Is there any evidence to this claim? Or did someone hold up a previous-gen Explorer 1 & say "yep, that's the same?"

ndirish2001 · 25 January 2024, 09:17 AM

Rolex is notorious for rounding up and down its case width numbers. You’re right to ask.

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JC316 · 25 January 2024, 09:49 AM

Quote:

Originally Posted by ndirish2001

Rolex is notorious for rounding up and down its case width numbers. You’re right to ask.

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Facts!

Krash · 25 January 2024, 10:41 AM

I have read on this forum many times that a DJ41 is actually 39mm. I have one and it’s probably true. It wears a lot smaller than my Submariner, and especially my 42mm Seamaster.

So maybe a DD40 is only 39mm.

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Patekfinder · 25 January 2024, 10:51 AM

Quote:

Originally Posted by TunaTuna

No then it would be a DD39. You are safe

This is not accurate. Rolex advertised numbers are rarely accurate, for example, the Daytona has never been 40mm.

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Patekfinder · 25 January 2024, 10:51 AM

Does anyone here own a DD40 with a set of calipers who can verify?

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S’portEye · 25 January 2024, 11:07 AM

Case diameter 39.25mm, lug to lug 47.25mm.

favx · 25 January 2024, 11:10 AM

Quote:

Originally Posted by ndirish2001

Rolex is notorious for rounding up and down its case width numbers. You’re right to ask.

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You are spot on.

MILGAUSS88 · 25 January 2024, 11:22 AM

Rolex measures there ase from 4 to 10 I believe.
The case flares out slightly there.
So yes they are all overstated.

MILGAUSS88 · 25 January 2024, 11:26 AM

https://www.rolexforums.com/showthread.php?t=766757

Previous discussion in measuring a Rolex with photos

Milkshake · 25 January 2024, 11:27 AM

Watchbox reviews: 40mm diameter 47.7mm lug to lug 12mm thick

ndirish2001 · 25 January 2024, 11:35 AM

Quote:

Originally Posted by Milkshake

Watchbox reviews: 40mm diameter 47.7mm lug to lug 12mm thick

I don’t think I’ve ever seen Tim Mosso give a width reading that’s not the official reading. I wouldn’t trust Watchbox for this particular type of measurement.

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Devildog · 25 January 2024, 11:46 AM

Quote:

Originally Posted by Patekfinder

I heard from someone the DD40 case is actually 39mm and not 40mm. Is this true?

Approximately, yes.

Just as the DJ41 is approximately 40mm

And steel (+yellow gold on Oyster) Daytonas were just under 39mm and are now just under 40mm

https://www.rolexforums.com/showthread.php?t=516534

Milkshake · 25 January 2024, 11:48 AM

Tim is very specific comparing it to DD II: 41mm diameter 53.2mm lug to lug and “both exactly” 12mm thick.

MILGAUSS88 · 25 January 2024, 12:25 PM

Article about how the Rolex measurements are diagonal, 2 to 8 or 4 to 10.
The case flares out as it goes to the lugs, so as mentioned earlier, all Rolex watch diameters are overstated.

https://millenarywatches.com/how-do-...e-my-rolex-is/

Krash · 25 January 2024, 12:57 PM

Quote:

Originally Posted by ndirish2001

I don’t think I’ve ever seen Tim Mosso give a width reading that’s not the official reading. I wouldn’t trust Watchbox for this particular type of measurement.

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I agree.

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Patekfinder · 25 January 2024, 01:02 PM

Quote:

Originally Posted by S’portEye

Case diameter 39.25mm, lug to lug 47.25mm.

39.25mm?? Where did you obtain this figure?

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painexpert · 25 January 2024, 01:13 PM

Quote:

Originally Posted by ndirish2001

Rolex is notorious for rounding up and down its case width numbers. You’re right to ask.

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Up for sure.

kb866 · 25 January 2024, 02:31 PM

Yes, it's not fully 40mm although I don't have my DD and calipers with me at the moment to give you an exact measurement. The DD does run ever so slightly smaller than 40mm though.

Andad · 25 January 2024, 02:44 PM

Omg.....

Patekfinder · 26 January 2024, 12:37 AM

Quote:

Originally Posted by S’portEye

Case diameter 39.25mm, lug to lug 47.25mm.

Can someone here confirm this??

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brandrea · 26 January 2024, 12:40 AM

It’ll depend on who measures it, how they measure and whether they’re calipers are properly calibrated

padi56 · 26 January 2024, 01:18 AM

Quote:

Originally Posted by Andad

Omg.....

Have to agree mate all this fuss over a mm or so,I remember many years they called my first car a Austin mini 1000 but found out it was only 998cc.Was thinking of sueing them over my lost 2cc as they said it was a 1000cc.

samson66 · 26 January 2024, 01:25 AM

DD40 = 39mm
DJ41 = 39.5mm

KatGirl · 26 January 2024, 03:59 AM

Quote:

Originally Posted by Patekfinder

Can someone here confirm this??

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Just measure it with your calipers.

Kat

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S’portEye · 26 January 2024, 04:19 AM

Quote:

Originally Posted by Patekfinder

39.25mm?? Where did you obtain this figure?

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I measured my watch with calipers last night. It’s a YG DD 40. I measured 3:30 to 9:30 on the case.

You can get different measurements as you go around the case, as it is not a perfect circle.

thatswhatshesaid · 26 January 2024, 04:45 AM

Quote:

Originally Posted by Krash

I have read on this forum many times that a DJ41 is actually 39mm. I have one and it’s probably true. It wears a lot smaller than my Submariner, and especially my 42mm Seamaster.

So maybe a DD40 is only 39mm.

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I agree, my DJ41 wears more like a 39 or 40mm.

samson66 · 26 January 2024, 04:55 AM

Quote:

Originally Posted by padi56

Have to agree mate all this fuss over a mm or so,I remember many years they called my first car a Austin mini 1000 but found out it was only 998cc.Was thinking of sueing them over my lost 2cc as they said it was a 1000cc.

If Rolex produced your car it would have been badged 1500

25 January 2024, 06:42 AM	#1
Patekfinder Banned Join Date: Nov 2023 Location: NYC Posts: 481	Is the Day-Date 40 actually 39mm? I heard from someone the DD40 case is actually 39mm and not 40mm. Is this true?

25 January 2024, 07:32 AM	#3
piratfisk "TRF" Member Join Date: Jan 2019 Real Name: Jake Location: Slam Diego Watch: 16233, 116619LB Posts: 2,221	Is there any evidence to this claim? Or did someone hold up a previous-gen Explorer 1 & say "yep, that's the same?" __________________ What's the time? It's time to get ill. Wishlist: 128236; 5396G; 15550ST; 384.029

25 January 2024, 02:44 PM	#22
Andad 2024 ROLEX SUBMARINER 41 Pledge Member Join Date: Nov 2006 Real Name: Eddie Location: Australia Watch: A few. Posts: 37,293	Omg..... __________________ E

25 January 2024, 07:20 AM	#2
TunaTuna 2024 Pledge Member Join Date: Jun 2021 Location: Merica Posts: 1,315	No then it would be a DD39. You are safe

25 January 2024, 09:17 AM	#4
ndirish2001 "TRF" Member Join Date: Jan 2023 Location: USA Posts: 159	Rolex is notorious for rounding up and down its case width numbers. You’re right to ask. Sent from my iPhone using Tapatalk

25 January 2024, 10:41 AM	#6
Krash 2024 ROLEX SUBMARINER 41 Pledge Member Join Date: Jan 2018 Location: Florida Watch: Sub, DJ41, GMT Posts: 7,835	I have read on this forum many times that a DJ41 is actually 39mm. I have one and it’s probably true. It wears a lot smaller than my Submariner, and especially my 42mm Seamaster. So maybe a DD40 is only 39mm. Sent from my iPhone using Tapatalk

25 January 2024, 10:51 AM	#8
Patekfinder Banned Join Date: Nov 2023 Location: NYC Posts: 481	Does anyone here own a DD40 with a set of calipers who can verify? Sent from my iPhone using Tapatalk

25 January 2024, 11:07 AM	#9
S’portEye "TRF" Member Join Date: May 2020 Location: Shreveport Posts: 1,283	Case diameter 39.25mm, lug to lug 47.25mm.

25 January 2024, 11:22 AM	#11
MILGAUSS88 "TRF" Member Join Date: Jun 2014 Location: mississippi river Posts: 3,049	Rolex measures there ase from 4 to 10 I believe. The case flares out slightly there. So yes they are all overstated.

25 January 2024, 11:26 AM	#12
MILGAUSS88 "TRF" Member Join Date: Jun 2014 Location: mississippi river Posts: 3,049	https://www.rolexforums.com/showthread.php?t=766757 Previous discussion in measuring a Rolex with photos

25 January 2024, 11:27 AM	#13
Milkshake Banned Join Date: Jan 2024 Location: USA Posts: 99	Watchbox reviews: 40mm diameter 47.7mm lug to lug 12mm thick

25 January 2024, 11:48 AM	#16
Milkshake Banned Join Date: Jan 2024 Location: USA Posts: 99	Tim is very specific comparing it to DD II: 41mm diameter 53.2mm lug to lug and “both exactly” 12mm thick.

25 January 2024, 12:25 PM	#17
MILGAUSS88 "TRF" Member Join Date: Jun 2014 Location: mississippi river Posts: 3,049	Article about how the Rolex measurements are diagonal, 2 to 8 or 4 to 10. The case flares out as it goes to the lugs, so as mentioned earlier, all Rolex watch diameters are overstated. https://millenarywatches.com/how-do-...e-my-rolex-is/

25 January 2024, 02:31 PM	#21
kb866 "TRF" Member Join Date: May 2023 Location: London and Taipei Watch: AP 15416CE Posts: 98	Yes, it's not fully 40mm although I don't have my DD and calipers with me at the moment to give you an exact measurement. The DD does run ever so slightly smaller than 40mm though.

26 January 2024, 12:40 AM	#24
brandrea 2024 ROLEX SUBMARINER 41 Pledge Member Join Date: Jul 2013 Real Name: Brian (TBone) Location: canada Watch: es make me smile Posts: 76,383	It’ll depend on who measures it, how they measure and whether they’re calipers are properly calibrated

26 January 2024, 01:25 AM	#26
samson66 2024 ROLEX SUBMARINER 41 Pledge Member Join Date: Jul 2013 Real Name: Mike Location: Downy Ocean Hon Watch: my money leaving! Posts: 13,511	DD40 = 39mm DJ41 = 39.5mm

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