Here is what you see when
the nameplate is off. Reinstall the cocking lever with the three screws.
The large, circled area
(lower left) is the slow speed gear train. CAREFULLY apply a few drops of
lighter fluid to the gears and see if the gear train will release if gummed
up. If it was running, but slow, it should gradually come back to life as
you wind and fire it. When it dries, if its still slow, then add a few drops
more and keep repeating.
You don't want to add too
much lighter fluid or it will carry the crud onto the aperture or shutter
blades. If this happens, or they are dirty to begin with, you can gently
swipe the blades with a tissue wetted with lighter fluid. Keep repeating
with clean tissues until its clean.
You should add a small
amount of grease to the shutter release rack where it rubs against the case.
Optionally, you can place two TINY drops of shutter oil (gun oil) to the
pivots on the star gear and the pallet. I wouldn't oil if it was running OK.
There is more you can do but
this should work 90% of the time. Good luck!
Remove the cocking lever
when done, and reassemble in reverse.