Leica Summilux Serial Numbers
4230, Leitz/Leica Canada Summilux 1:1.4/35mm lens, black body, circa. 4271, (lot of 4) Leica/Leitz 111f camera bodies, serial numbers:.
Leica Summilux Serial Numbers
Software Serial Numbers
This Japanese site has pictures of both collapsible Summicron (SOOIC) variants:are detailed enough to distinguish between the early, radioactive variant and the later version, even without serial numbers (or a Geiger counter!). The 'Summitar.' (which does indeed bear this model name on the front of the lens) is also shown (described here as a 'Prototype Summicron'), and there's a group picture of both LTM SOOICs, the SOOIC-M and the rigid SOMNI for comparison.