S. Epson Caliber VS75 Watch Movement

Manufacturer	S. Epson Corp. (Seiko)
Caliber Number	VS75, VS75A, VS75B
Movement Type	Quartz, solar-powered
Display	Analog
Lignes	12”’
Diameter	27.6mm
Casing Diameter	27mm
Height	4.4mm
Jewel Count	0
Frequency	32,768 Hz
Accuracy Rating	+/- 20 seconds/month
Capacitor Part #	See below…
Battery Life	~6 months on a full charge
Stem Part #	0351 587 (0351587)
Hand Count	6
Hand Sizes	1.10mm / .65mm / .21mm / 3 x .21mm (subdials)
Functions	Central hours; central minutes; central chronograph seconds; small seconds at 9:00; 60 minutes chronograph counter at 6:00; 24 hour indicator at 3:00; date at 4:30
Subdial Layout	Tri-Compax (3-6-9)
Hacking Seconds?	Yes
Other Features	Overcharge prevention, AC reset
Country of Manufacture	Made in Japan
Known Models	Orient Solar Chronograph Sports Watch (Refs: RA-TX0203S, RN-TX0204E) (Add your watch to the comments below…)

The S. Epson caliber VS75 is a solar-powered quartz chronograph movement with a 24 hour indicator.

This calibre has been produced since at least October 2012 (VS75A), with an evolution update around August 2023 (VS75B).

VS75A VS VS75B:

The main difference between the A and B versions appears to be the capacitor part number.

	VS75A	VS75B
Capacitor Part #	3023.24H	3023.34T

Basically, the 3023.24H capacitor (aka secondary battery) was replaced with a newer 3023.34T.

VS752?

It appears that Orient is using the cal. VS75 in their Solar Chronograph (Ref: RA-TX0203S10B), however, they have it listed as VS752. It is unclear what the extra “2” is, but perhaps it stands for “B”, which is the current iteration as of this post. If you have an Orient watch with the so-called VS752, please consider submitting images.

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