Condition Rank : Good
(Full serviced on Feb 12, 2026)
[Description of services]
Full disassembly, cleaning, inspection, lubrication, and assembly.
[Originality Verified] - Authentic Original
The critical components (case ＆ caseback, dial, and movement) are original, and the key components (crown, hands, and bezel) are original as well. The period correctness is also consistent.
Please note: bracelet originality is not considered in this assessment; the bracelet is genuine Rolex, but it is a replacement from a different period and is not period-correct for the watch.
[Features]
Ref:1603 / cal.1570 (with hack) / 19800bph / 36mm case (excluding crown) / 20mm lug / Rare σ Dial
Accuracy -5~+9 sec/day
Year of manufacture : c1974
Serial No. : 379xxxx
Non-waterproof
[Dial] : Good
Features a “Sigma” dial (σ σ), a subtle hallmark indicating gold dial furniture—an era-correct touch.
It remains in original condition.
To convey the state of the tritium, I have attached an image showing the dial and hands illuminated by UV light. The luminous properties are not active. It does not glow in the dark.
[Hands] : Good
[Crystal] : Very Good
Plexiglass
[Case, crown and back of the case] : Good
Crown screw-in is good. (1.0 turn of crown to unlock)
The serial number engraving is somehow readable with a magnifying glass.
[Band] : Good
ROLEX Oyster SS Jubilee Bracelet
Ref:62510H/55 End 20mm
code : W11
The buckle appears to have been replaced with a later model.
Wrist Size : Approx. 18.5cm
Check your wrist size before purchasing.
[Action] : Very Good
It runs well by Hand-winding and Automatic.
We've seen it run for long hours.
The winding of the crown is very good.
[Accuracy] : Very Good
The day difference time is about -5~+9 sec / day.
(Measured by Timegraphers)
The accuracy may vary depending on the posture.
This is a vintage watch, so do not expect the same accuracy as a quartz watch.
If you are looking for perfect accuracy, please do not buy.
