7S26 Mainspring And Pawl Lever

[jdm]

I'm doing my first 7S26 repair (actually my first repair ever) and I'm doubtful about replacing these two.

The watch would get very little power, 10H or so even when kept vertical on the winder for a ling time. Winding at the ratchet made it run a normal time. I could not see any obvious reason for that.

 

 

 

[Blacklab]

Its probably worth changing the mainspring as a matter of course. The poor power reserve is normally just down to dirt and old lube. If the watch is still having problems after cleaning, the self winding system is easily accessible with the movement still in the case.