6536 Stem won’t set time

[clbcpa]

Hello everyone.

I have a 6536 which runs fine. However, I got it out to wear this morning and needed to set time. Stem set in position fine but upon moving the mechanism became stiff and eventually stopped moving the hands. The watch is running and the stem sets it position just fine.

Any one with a similar experience? Currently just letting it wind down in the watch case

Carey