Identify this BNIB very old watch

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For many years Rolex made many of their bracelets in the US for US retailing. 14k gold was used instead of the normal 18k, that all changed in the late 70's when those local bracelets (which weren't very good) were discontinued.
What is the best Era of Rolex and Omega's in terms of quality and craftsmanship?
 
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What is the best Era of Rolex and Omega's in terms of quality and craftsmanship?
::stirthepot::::stirthepot::::stirthepot::
 
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Technology is always advancing so realistically it’s hard to say that watches were better in the past. But they were certainly more charming.
 
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I am a watch novice, I am guessing I shouldn't attempt to do it myself and acquire proper tools.

I would personally recommend not doing it yourself. It ruins the BNIB nature of the watch when/if you add a big gouge ok the back. Not to doubt your abilities but the odds of successfully opening it without leaving a mark for most people would be very low.

I am fanatical about fine details and not know what it is drives me crazy

Unfortunately, there is a pretty good chance that opening the back won’t get you all the details you seem seek. A movement serial would likely help discern an approximate year. You would likely find a gold stamp. However, locally made cases often had their own local reference numbers. As far as I know, there aren’t really much records of these and there is sparse information available online about many local/less popular reference numbers.
 
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All these years I thought omegas were always made at one facility like Rolex
And technically, Rolex wasn’t made at one facility as you say. Like other brands, Rolex contracted out for parts such as cases, dials, hands, movements/parts and so on. And it wasn’t until much later, in their more modern history, did Rolex make the move to become “in house”, which they accomplished by purchasing all their suppliers. In the 90’s Rolex purchased case maker Genex, 1998 bracelet maker Gay Frères, 2000/1 dial maker Beyeler, winding crown supplier Boninchi, & Virex et Joli Poli for case/bracelet finishing, and in 2004 they purchased Aegler, which is the company that supplied movements.
 
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And technically, Rolex wasn’t made at one facility as you say. Like other brands, Rolex contracted out for parts such as cases, dials, hands, movements/parts and so on. And it wasn’t until much later, in their more modern history, did Rolex make the move to become “in house”, which they accomplished by purchasing all their suppliers. In the 90’s Rolex purchased case maker Genex, 1998 bracelet maker Gay Frères, 2000/1 dial maker Beyeler, winding crown supplier Boninchi, & Virex et Joli Poli for case/bracelet finishing, and in 2004 they purchased Aegler, which is the company that supplied movements.
Had no idea. Thank you very much. I always thought Rolex was in house for most of its existence
 
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Generally, the golden age for watches is considered the 50’s-60’s.
 
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thanks for the replies guys I’ll see if I can open the back there is a little thing that sticks out I’m noticing now.
As others have mentioned, it would be a good idea to have a watchmaker open it for you as they are experienced at doing this,( if you are not confident)

However, having said this:

Even if a watchmaker does open it, there is always a small risk with the gold flap of the back getting some small scratch since it is soft metal. I have always avoided buying any watch regardless of brand that has a snap on back simply because of this reason. I have seen snap on backs that look like that they have been molested with coarse sandpaper where case back meets case.

I have a NOS oversize 38mm manual wind Zenith wiith subseconds which has a snap on back. I used an old credit card with a sharpened edge like a knife blade and tried to pry it between the indented slot between where the two mating surfaces meet and then hit it with a small rubber mallet. It opened it like hot knife through butter without a scratch. You may wish to try this and avoid scratching a new old stock case. The worst that can happen is that it will not open but at least it wont scratch it as the moh number of plastic is far less than that of steel or gold. If else fails go to a watchmaker.