Rare lens in near mint condition . Very minor surface marks

The lens has been professionally ultra sonically cleaned, completely stripped and serviced

There are no visible flaws to optics, no cleaning marks, no internal dust, no oil on diaphragm and focusses smoothly as the old grease has been replaced with new professional grade lubricant (old grease will get harder when temperatures drop making focusing difficult)

I doubt there are many better examples

Trusted ebayer; I have sold a couple of Helios lens in the past please check feedback

NB tread is m39 you may wish to get a step up ring to m42 which are universally available and cheap:  http://www.ebay.co.uk/itm/M39-to-M42-Screw-Lens-Mount-Adapter-Step-Up-Ring-For-Pentax-M39-M42-PB-/201730637199?hash=item2ef8153d8f:g:z8gAAOSwcUBYOpKz

I have attached some pictures taken with the lens ( I don't claim to be a proficient photographer and these were taken in poor light at dusk but at least it gives some idea of the lens capabilities)