Zinc sulfide production years

[Rolessor82]

Hello guys!

Just a quick question: is is possible for a 1675 serial 1.802M to have zinc sulfide? That serial would place the watch around 1968. Asking 'cause I have seen many '68s 1675 without it. So, is it possible that back then there was an overlap using two compounds?

Thank you!

[springer]

Maybe, maybe not. Most GMTs in the 1.7XXXXX range have the "greenie" dials/hands. As far as the 1.8 million serial numbers go, I've owned several GMTs with 1.8 million serial numbers and none of them were "greenies" but that's not to say it couldn't happen. It just hasn't happened to me.

By the way, based on your posts, are you buying and stocking up on vintage watches to open up a storefront? Inquiring minds want to know.

[Rolessor82]

Haha thanks John. I am indeed. I sold about 4 watches the last three months and I'm updating my collection with some sells and some buys.

Regarding your answer. It does not look "greenie". I'll post a pic now

[springer]

Originally Posted by Rolessor82

Haha thanks John. I am indeed. I sold about 4 watches the last three months and I'm updating my collection with some sells and some buys.

Regarding your answer. It does not look "greenie". I'll post a pic now

Most 1968 GMTs with the 1.8XXXXX serial number have tritium that looks white under a UV light.

[Rolessor82]

Well, now that you mention it and see the watch with your comments in mind. It linda looks "greenie" but more like "yellowish"

[springer]

Looks like a greenie.

[Rolessor82]

Appreciate your help and comments John. No wonder you are a Pledge Member.
Thanks

[Rolessor82]

According to Andrew from "GMTMaster1675.com" it could be. Below an excerpt from his page:

" Lume: SN 1.6-1.8m — Zinc sulfide dials were still used (a carry over from the gilt era). These appear more puffy and maintains phosphorescence when exposed to UV light"

[TuRo]

What does it lume up like - If a ZS dial of that c 67/68 period, dial and hands should lume up bright and even green for a couple of mins often - either side date wise they tend not too. General comment only.

[Rolessor82]

See my pic above Paul. It does glow bright and fades evenly quickly like a gilt dial. No worries there. My question is regarding timeframe (late 60s). In this particular watch, 1968 (1.802M).

I sold a 1.9M from 1969 that had the correct waffle-like texture lume plots in white color. No glow there.

[Dan S]

Originally Posted by Rolessor82

Appreciate your help and comments John. No wonder you are a Pledge Member.
Thanks

You can also be a pledge member if you'd like to support the website. It involves making a modest donation.

See the instructions here: https://www.rolexforums.com/showthread.php?t=834483

[TuRo]

Originally Posted by Rolessor82

See my pic above Paul. It does glow bright and fades evenly quickly like a gilt dial. No worries there. My question is regarding timeframe (late 60s). In this particular watch, 1968 (1.802M).

I sold a 1.9M from 1969 that had the correct waffle-like texture lume plots in white color. No glow there.

Tbh I've seen waffle/criss-cross lume dials that do and don't lume up big time, and also the heavily domed (almost like a half circle - which usually do lume up strongly) and flatter lume that does and doesn't too - this is all models not 1675 only!
So, I head-scratchlingly concluded, the use of ZS was across various lume plot /dial types over that fairly brief 2 or so year period.
Ps the lume application on the 6 and 9 of as JP puts it a 'greeny', can be sloppy and we'll over the edge as yours is !
PPS - Fuchsia is Fantastic ✓
Ref opening up a storefront JP quipped about - I see you are in the Carribbean - I was the only person one in a store you might know, John Bull in Nassau, a few years back browsing some Rolex - when there was an enormous buzzing noise and commotion in the street....then suddenly the doors swung open and I'm guessing 1000 people literally ran into the store, physically grabbed all the salespeople (incl the one helping me) and hoovered up all the Rolexes in 90 mins like demented locusts....they then left and got back on their cruise ship. Next day Manager told he he'd done $1.8m in 90 mins - so a good market to be had :-)

[SignotheTimes]

Here is a link regarding "Luminous Material"

https://rolexhaven.com/luminous-material.html

[SignotheTimes]

Here is my Ref. 1675 (1.9 Mil. Serial) Is the lume correct here?

[Rolessor82]

Originally Posted by pauldavidthorpe

Tbh I've seen waffle/criss-cross lume dials that do and don't lume up big time, and also the heavily domed (almost like a half circle - which usually do lume up strongly) and flatter lume that does and doesn't too - this is all models not 1675 only!
So, I head-scratchlingly concluded, the use of ZS was across various lume plot /dial types over that fairly brief 2 or so year period.
Ps the lume application on the 6 and 9 of as JP puts it a 'greeny', can be sloppy and we'll over the edge as yours is !
PPS - Fuchsia is Fantastic ✓
Ref opening up a storefront JP quipped about - I see you are in the Carribbean - I was the only person one in a store you might know, John Bull in Nassau, a few years back browsing some Rolex - when there was an enormous buzzing noise and commotion in the street....then suddenly the doors swung open and I'm guessing 1000 people literally ran into the store, physically grabbed all the salespeople (incl the one helping me) and hoovered up all the Rolexes in 90 mins like demented locusts....they then left and got back on their cruise ship. Next day Manager told he he'd done $1.8m in 90 mins - so a good market to be had :-)

Amazing! Thanks for sharing

[Rolessor82]

Originally Posted by SignotheTimes

Here is my Ref. 1675 (1.9 Mil. Serial) Is the lume correct here?

Looks fantastic. And I believe is all correct. That was the same texture and sparkle of my previous 1675 also 1.9M serial

[Rolessor82]

Originally Posted by SignotheTimes

Here is a link regarding "Luminous Material"

https://rolexhaven.com/luminous-material.html

Thank you. Great info there. In fact I'd like to share an image from it. Apparently 1968 was the year glowing texture ended so there could be both types of dial out there. So I guess is safe to say my ZS dial is correct :)