Nikkor. And it is very clean, otherwise I wouldn't have taken it. I think my plan is to use this for a bit and then get another one - Mamiya C220 or 330 is high on my list, because of the lenses. I don't mind having several TLRs... The same with my 35mm - I have an F-1 (currently being serviced) and plan to get an FTb. And lots of lenses.