payasam
a.k.a. Mukul Dube
eBay item 320154215576 is described as a IIIa (a 111a, actually) but the pictures show a IIIb. One thing which is perhaps odd is the shutter release.
VictorM. said:Threaded hole for a cable release usually indicates a Russian copy.
Rob-F said:Yes, it is a IIIb. There is something coming out of the body to the left of the 9:00 position of hte lens mount. Looks like an allen-head screw. Could this be the flash synch Colyn wrote about? Pretty strange place for one--in the way of focusing the lens.