Couldn't believe what I found this evening!

[padi56]

Originally Posted by Atl

I'd buy it, haven't see one in years. The Edsel of Rolexes! I like the case design, and it is the Rolls of Quartz watches.

Would agree with you 20 years ago but in the Quartz department think now for the time being. The Japs have
the most cutting edge quartz movement,but there is talk of Rolex producing one to take them on.

Thermocompensated watches made by Rolex:

Caliber: Rolex 5035 (and 5055 for the Day-Date model)
Technology: single 32 kHz crystal using the forced constant frequency (TCVCXO) method
Annual accuracy: around ±60 seconds (Rolex has never stated an official accuracy specification.)
Rate adjustable?: yes, via trimmer condenser (user adjustable)
Watches that use this movement:

Rolex Oysterquartz (1977 to 2001)

Note 1: We are unaware of any other watch using TCVCXO technology.
Note 2: While discontinued, we have heard that Rolex plans to introduce a new quartz movement with update technology and perpetual calendar. More can
Ref http://www.oysterquartz.net/

Caliber: Citizen Crystron Mega Technology: Single high frequency (4MHz) AT-cut crystal
Annual accuracy: ±3 seconds (We do not know if Citizen recommended a minimum wear time to assure performance to this specification.)
Rate adjustable?: Most probably yes, by the Service Centre in Japan. We do not know the specific adjustment mechanism.
Watches that use this movement:

Citizen Crystron Mega

Note 1: This is the tightest specification ever claimed for a watch!
Note 2: The battery lasted one year.
Note 3: Only 3000 were made.