Yes, I'm getting confused over numbers too, I just found the identical photo, but it's labelled the BOK-11, flipped of course! I didn't look at it before because one of the sites I found that listed all the BOK series, said that it had retractable gear
Just digging a little more, my site says that reports of the "BOK-15" really refer to the BOK-11 and that if developed it would have been a very good Strategic Reconnaissance aircraft. LM's light is out, so OH if he has it as the 11.
I'm long past the time I said that I had to go, so I'll say goodnight and good luck!