S Epson Caliber Vs75 Vs75a Vs75b

S. Epson Caliber VS75

Quartz
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S Epson Caliber Vs75 Vs75a Vs75b

ManufacturerS. Epson Corp. (Seiko)
Caliber NumberVS75, VS75A, VS75B
Movement TypeQuartz, solar-powered
Display
Analog
Lignes12”’
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 Count6
Hand Sizes
1.10mm / .65mm / .21mm / 3 x .21mm (subdials)
FunctionsCentral 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 ManufactureMade 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.

VS75AVS75B
Capacitor Part #3023.24H3023.34T

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.

Additional Resources:

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