P3D V-M viewer repairs

["John Goodman" <jgood@xxxxxxxx>]

In the course of acquiring a small collection of V-M reels,  
several "standard" Sawyers viewers (dark brown Bakelite, 
no model name) were included, only one of which is really 
satisfactory. The others have schmutz on the interior 
surfaces of the simple lenses or the internal mask edges 
are not clean. Before I drill out the rivets and split the 
shells for cleaning the inside, I'd like to know what I'm 
getting into.

I found some schematics of these viewers' construction on 
the Net, but they lacked detail. I don't want springs flying in 
all directions during disassembly, and would be grateful for 
pointers or direct info about the innards and assembly 
procedures, in detail.   TIA.



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