A couple of months back I purchased this on Ebay… It's a Russian macro extension bellows - it was made in the USSR in 1972, so it's in an incredibly good condition, and I doubt it has really ever been used.
I intend to use it on my Olympus OM-D E-M5 together with my vintage M42 mount lenses for some really up close macro photography, and I'm looking forward to playing around with it, but I haven't really gotten around to do it yet - so I'm now putting it on my desk, so I don't forget about it again :-D…