105/3,5 for M39 SLR cameras, multicoated.

The same lens was used for Moskva-5 cameras with between the lens shutter.

When the production of Moskva-5 stopped Industar-24 was modified for use with SLR cameras like Zenit and became the Industar-24M.

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More about Industar-24M:

http://www.zenitcamera.com/archive/lenses/industar-24.html