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I have trying to find more information on the quartz movement used by Omega in the Seamaster Professional line. The specs for the caliber 1538 are below (previously posted on Zowie by a forum participant):
Dimensions 2.60 x 23.30 mm
Number of rubies 6
Power reserve 36 month
Systems Time Zones, Stepping motor controlles drive(ASS)
Inhibition (adjustment), End-of-life
battery indication (EOL)
Special finishing white rhodium-plated movement
An inhibition mechanis to adjust the accuracy (thermal compensation).
Power type Renata battery No. 373, made of silver-oxide.
This movement is the closest thing to the 1538 I could find listed by ETA. It has all of the features of the Omega 1538 except that it lacks the thermal compensation and is 0.15mm thinner. This leads me to suspect that the 1538 is a modified 255.461 exclusive to Omega.
ETA 255.461
Ø 23,30 mm, H 2,45 mm
Technical specifications
Hours, minutes, second in the center
Mechanism of time zone
Day of the month, corrector
Device stop and switch
Indicator of end of lifetime (E.O.L.)
6 jewels
Does anyone have more information?
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