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MorningTundra · 20 November 2019, 09:41 PM

When did the color of the back of the insert change from red to blue? Year or model ref.

Did this mark a change in the production process? Why did it happen?

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1675-David · 20 November 2019, 10:51 PM

Quote:

Originally Posted by MorningTundra

Did this mark a change in the production process? Why did it happen?

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There is no way of knowing this!!

linesiders · 20 November 2019, 11:06 PM

The rough guess is early in the 16750 range but no hard time.

springer · 21 November 2019, 01:49 AM

The blue-back inserts arrived during the early 1980s.

MorningTundra · 21 November 2019, 02:09 AM

So, red for 1675 and blue for 16750 in the early 1980s?

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springer · 21 November 2019, 10:15 AM

Quote:

Originally Posted by MorningTundra

So, red for 1675 and blue for 16750 in the early 1980s?

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Early 1980s are red backs. They back side color switched sometime around the early 1980s to blue.

Sherbie · 21 November 2019, 12:06 PM

If this helps My 16750 with serial 8.58 mln came with a red back - so around 1984 ish ( depending on what date chart you use)

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20 November 2019, 09:41 PM	#1
MorningTundra "TRF" Member Join Date: Apr 2016 Real Name: Morningtundra Location: USA, UK & HKG Posts: 1,037	GMT aluminum bezel insert (back) color? When did the color of the back of the insert change from red to blue? Year or model ref. Did this mark a change in the production process? Why did it happen? Sent from my iPhone using Tapatalk

20 November 2019, 11:06 PM	#3
linesiders 2024 ROLEX DATEJUST41 Pledge Member Join Date: Dec 2011 Location: RedSox Nation Watch: U Talkn Bout Wilis Posts: 5,425	The rough guess is early in the 16750 range but no hard time. __________________ I'm a sailor peg. And I've lost my leg. Climbing up the top sails. I've lost my leg!

21 November 2019, 01:49 AM	#4
springer 2024 Pledge Member Join Date: Apr 2008 Real Name: jP Location: Texas Watch: GMT-MASTER Posts: 17,197	The blue-back inserts arrived during the early 1980s. __________________ Member of NAWCC since 1990. INSTAGRAM USER NAME: SPRINGERJFP Visit my Instagram page to view some of the finest vintage GMTs anywhere - as well as other vintage classics.

21 November 2019, 02:09 AM	#5
MorningTundra "TRF" Member Join Date: Apr 2016 Real Name: Morningtundra Location: USA, UK & HKG Posts: 1,037	GMT aluminum bezel insert (back) color? So, red for 1675 and blue for 16750 in the early 1980s? Sent from my iPhone using Tapatalk

21 November 2019, 12:06 PM	#7
Sherbie "TRF" Member Join Date: Jul 2015 Location: Tx Posts: 150	If this helps My 16750 with serial 8.58 mln came with a red back - so around 1984 ish ( depending on what date chart you use) Sent from my iPad using Tapatalk

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