Interesting quirk on my AP Diver

[kctt]

I've had the watch from new for 10 years now and found an interesting quirk that I never knew. These days, the watch is hardly worn and sits in the watch drawer.

Two days ago, I decided to set the time to the 10:10 position. At this time, the watch does not have any power reserve left. I don't remember the position of the hour and minute hands, just that I set it to 10:10. When I screwed the crown back on, I noticed the watch was ticking. I didn't move the watch that much to have caused the rotor to wind the watch. Hmmm... maybe the mainspring hasn't fully unwound I thought. Strange.

The next morning, the watch stopped running but the time showed 4 o'clock! Means the watch was actually ticking for 6 hours! I then set it to 10:10 again but this time was careful not to move the watch at all. Again, the watch was ticking after I screwed the crown. This morning, I found the watch showing around the half past 4 mark again! I repeated the exercise and this time watch stopped just before 5 o'clock. Seems like the watch runs for around 6 hours each time.

Before you guys say anything, I didn't wind the watch, it was on the set time position. What do you think happened here? I'm keen to hear if anyone came across this before.

[mnl]

Originally Posted by kctt

I've had the watch from new for 10 years now and found an interesting quirk that I never knew. These days, the watch is hardly worn and sits in the watch drawer.

Two days ago, I decided to set the time to the 10:10 position. At this time, the watch does not have any power reserve left. I don't remember the position of the hour and minute hands, just that I set it to 10:10. When I screwed the crown back on, I noticed the watch was ticking. I didn't move the watch that much to have caused the rotor to wind the watch. Hmmm... maybe the mainspring hasn't fully unwound I thought. Strange.

The next morning, the watch stopped running but the time showed 4 o'clock! Means the watch was actually ticking for 6 hours! I then set it to 10:10 again but this time was careful not to move the watch at all. Again, the watch was ticking after I screwed the crown. This morning, I found the watch showing around the half past 4 mark again! I repeated the exercise and this time watch stopped just before 5 o'clock. Seems like the watch runs for around 6 hours each time.

Before you guys say anything, I didn't wind the watch, it was on the set time position. What do you think happened here? I'm keen to hear if anyone came across this before.

isn’t it a screw down crown? i’m guessing while setting the crown back in the locked position it’s getting wound up enough to run for a few hours

[kctt]

Originally Posted by mnl

isn’t it a screw down crown? i’m guessing while setting the crown back in the locked position it’s getting wound up enough to run for a few hours

When I screw the crown back, I push it to feel the thread before screwing it back on. I'm almost certain at the point where I start the screwing down, the action doesn't wind the watch?

[NutNut]

I agree with @mnl in that the watch winds when you screw the crown back into the lock position. I have a Dual Time with a power meter and noticed that the hand goes up 2 or 3 ticks when locking it. This gives it about 3 or so hours of running time.


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[dcash0615]

Originally Posted by mnl

isn’t it a screw down crown? i’m guessing while setting the crown back in the locked position it’s getting wound up enough to run for a few hours

This

[kctt]

Originally Posted by mnl

isn’t it a screw down crown? i’m guessing while setting the crown back in the locked position it’s getting wound up enough to run for a few hours

Originally Posted by NutNut

I agree with @mnl in that the watch winds when you screw the crown back into the lock position. I have a Dual Time with a power meter and noticed that the hand goes up 2 or 3 ticks when locking it. This gives it about 3 or so hours of running time.


Sent from my iPhone using Tapatalk

You are both right. I've repeated the same experiment without setting the time. Just by screwing the crown back on, gives enough juice for the watch to run for 5 hours. Learnt something new today. Cheers fellas.

[Burlington]

Originally Posted by kctt

You are both right. I've repeated the same experiment without setting the time. Just by screwing the crown back on, gives enough juice for the watch to run for 5 hours. Learnt something new today. Cheers fellas.

I had indeed noticed the phenomenon - but great to have the duration quantified as I was always curious about that.