[Leica] CAL/repair of beaten up M3 - shutter repair..., viewfinder contrast

[alex at zabrovsky.com (Alex)]

I'm getting ready to ship two of our M3 beaten up bodies to get 
CLAed/repaired in US (presumably by Youxin Ye).
Both have shutter/winding stack, one in closed position (curtain appears 
to be OK), the other one in fully opened position.
The second one, with fully opened shutter makes me worry: I can't see 
any signs of curtain present there. The film gate is fully opened, there 
is not curtain edges visible at either side of the gate.
Does that mean there is no curtain ? (perhaps it has separated and got 
lost) ?

Assuming this is the case, does that sound like quite expensive shutter 
repair ? What do you think ?

Also, comparing the viewfinder of both M3's with my M6, the finder of 
both m3's looks considerably less contrasty then of M6, though frames 
and focusing appear to be fine. The image though M6 finder appears to be 
clearer due to higher contrast. Is that normal for M3s ?

Thanks, Alex