Originally Posted by luigi bertolotti
Giordano is right, the older is a IIIa: is rather a common item, that can work very well and is the last of the "old screw mount bodies" (not die cast structure, but folded sheet metal).
The M3 is much more interesting for is a very early item of the FIRST production batch dated 1954, with all the details that this means (shutter with "old" scale, red slot in the rewind knob, no frame selector... and surely double-stroke arm lever and glass film pressure plate) : it is a piece of significant interest for collectors as all the 70x.xxx numbered items; its box is also a very valuable add-on: btw, camera+box could fetch a good amount of $ (surely >1K) if you wish to sell it.
Two details looking at your pics... the M3 shows the screw-to-bayonet adapter quoted by Chad (correctly, it's for a 90 mm lens, as you have one); also, in all the pics the M3 seems to HAVE NOT its baseplate... I hope it is somewhere... camera cannot work without, the replacement can be found, but it's a pity if it would be missing.
The Summarit 50 1,5 (at the time, a prestigious lens) seems to have glass someway hazy, in the pic you posted: this isn't strange for this lens, which is of delicate glass; inspect it carefully: if it is really "dirty" but not badly scratched, there are labs that can repolish it : can worth the cost for if clean it's still an enjoyable lens (I have one, very clean, and use it sometimes even on my digital M8...). The Elmar 90 f4 is a very common lens (it had lot of variants, but almost all are rather common on the marketplace) : respect to Summarit, if its glass is hazed/dirty/scratched, doesn't worth a repolishing : easy to verify well, for the optic (a very compact 4 element group) can be unscrewed from the focusing tube: try to do it, even if at first can seem hard to unscrew: it was a standard facility to mount the lens unit on macro/reflex devices (the Visoflexes) so there is no problem to unscrew-screw on again it.
And keep in mind : it's all LOVELY gear !!!
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