Is this what it looks like? Almost fully charged? Nowhere near?

Book spec is 120 hours of power reserve and I've not been getting that: maybe I'm not active enough? I gave the watch a quick charge late last night - but maybe not enough - and to my surprise this morning it was stopped.

So I've given the watch a big wind on the stem during which I could see the top barrel going round with the spring compressing and the lower barrel spring compressing but I didn't see the lower barrel "spokes" moving?

A full waking day of wear today including occasional wrist flicks ought to provide a fair test I hope?

My Twelve X was already set and fully wound (like your pic) when I picked it up from CW.

Checked it again this morning after topping up with a further hours wear (I didn’t wear it yesterday for more than an hour) and it’s back to fully powered.

The longest time without any wear so far is about 60 hours - just so I could get a view of the barrels partially unwound.

Neil

The SH21 takes a LOT of winding to get to fully wound. I would think it's quite difficult to get it fully wound from wrist movement alone unless you are very active over a prolonged period. So, if you're not that active, definitely remember to give it a manual wind fairly regularly, as it will run better the nearer to fully wound it is.

Bahnstormer_vRS wrote: ↑Mon Dec 23, 2024 12:13 pm @tikkathree

From my experience with the C60 Concept, Apex and Trident Mk2 SH21, it would take a day's reasonably active (hour and a half walking dog etc.) motion to get around 4 days PR into the watch, then topped off the following morning.

I'm not quite so active these days so would think 3 days PR on the 1st day's wear then topped off to 5 days PR by mid/late afternoon the following day.

As to what a fully wound, or thereabouts, SH21 looks like;-

Bahnstormer_vRS wrote: ↑Fri Oct 20, 2023 3:01 pm Another day with the C60 Concept, fully wound to boot, but now on a Zuludiver HydraRib NATO.





Guy

Sent from my Galaxy S23 Ultra using Tapatalk

Guy

Guy, and do you find it easy to see both barrels rotating?

Bahnstormer_vRS wrote: ↑Mon Dec 23, 2024 1:53 pm

tikkathree wrote: ↑Mon Dec 23, 2024 1:48 pm . . . . . .
Guy, and do you find it easy to see both barrels rotating?

If you're hand winding; the top barrel (at 12) rotates as you wind and there is then a periodic 'click' as power is released into the other (at 8 ) barrel.

Wearing on the wrist, you simply see the spring getting tighter over time.

Guy

Guy I was just coming back to edit my last post to thank you for your observations on the time/effort it takes to charge fully @welshlad your inputs too. The periodic click is the kind of noise which could cause alarm when you're not expecting the sound. Just before creating this post I went from "hands on keyboard" to "hand in front of face" and not only noticed that the lower barrel had changed position - I'm monitoring a "spoke" end relative to the 9 marker - but also watched the top barrel move round by about 30 degrees. Talk about watching paint dry but much more satisfying

There is a tolerance around the 120 hour claim. You should get at least 118 hours and up to 122 hours though. This is based on my experience with the three SH21s I own. I don't know what the official tolerances are though. I normally give them 2 - 3 days worth of power reserve using a manual wind and let them go from there and haven't had too much difficulty getting them to be full. The C60 Concept is useful as you can see that the barrels are fully wound as Guy has pointed out.
From my C7 Apex I know it can take up to 120 winds to get the power reserve up to 5 days. I think the 120 hour power reserve is a "be careful what you wish for" situation. For a hand wound watch it is a boon as once you've accepted that you will be winding it a lot on day one, you don't have to wind it every day. For an automatic you have to accept that it is going to take a lot of activity to achieve a fully wound state. Without a power reserve it can be hard to tell if you've actually got there. Now I wish I hadn't let the SH21 Snow Leopard get away.

Just observing my watches that have the power reserve dial, it takes about 120 turns of the crown to get my SH21 powered watches to full capacity. My sole automatic SH21 gets about two days of power per day of wear based on my activity.

I know crown size matters significantly but I have a couple of Peseux 7001 manual watches and among them they may take 20-30 turns for a full 42 hour reserve.

tikkathree wrote: ↑Mon Dec 23, 2024 2:06 pm

Bahnstormer_vRS wrote: ↑Mon Dec 23, 2024 1:53 pm

tikkathree wrote: ↑Mon Dec 23, 2024 1:48 pm . . . . . .
Guy, and do you find it easy to see both barrels rotating?

If you're hand winding; the top barrel (at 12) rotates as you wind and there is then a periodic 'click' as power is released into the other (at 8 ) barrel.

Wearing on the wrist, you simply see the spring getting tighter over time.

Guy

Guy I was just coming back to edit my last post to thank you for your observations on the time/effort it takes to charge fully @welshlad your inputs too. The periodic click is the kind of noise which could cause alarm when you're not expecting the sound. Just before creating this post I went from "hands on keyboard" to "hand in front of face" and not only noticed that the lower barrel had changed position - I'm monitoring a "spoke" end relative to the 9 marker - but also watched the top barrel move round by about 30 degrees. Talk about watching paint dry but much more satisfying

Very interesting thread! I hope you're able to measure roughly 120 hours out of it. Seems like something that could drive us OCD folks mad if not working correctly.