Here’s a link to all the SH 21 movements on the CW Archive.

I think the 31 jewel is one with a power reserve indicator.

Amor Vincit Omnia wrote: ↑Fri Jul 15, 2022 2:37 pm Here’s a link to all the SH 21 movements on the CW Archive.

I think the 31 jewel is one with a power reserve indicator.

Might be the automatic ones have more jewels too... for the ones I have:

• C60 Concept - 31 jewels - Automatic, no Power Reserve

• C1 Grand Malvern 5 Day Automatic - 31 jewels - Automatic, no Power Reserve

• C65 Trident Diver SH21 LE - 33 jewels - Automatic and Power Reserve

• C65 Trident Diver Bronze SH21 LE - 27 jewels - Manual, no Power Reserve

• C1 PowerGlow - Jewels not specified (it is a prototype though!) - Automatic, Power Reserve

So it seems the extra jewels are required for both the Power Reserve and the Automatic Rotor... although it's not 100% clear, as the C8PR I used to own, is shown as only 27 jewels, but does indeed have a Power Reserve, although Manual and some listed have as many as 35 jewels

Cheers, Gary

And don’t forget small seconds on some of these SH21 models.