340 crank

I have a crank lying around which I think maybe from a 340. Anyway of telling if it is? po# location? Bearing diameter? I will admit that I do not feel like digging it out and looking for myself right now. Hoping the pros can come through

Also how much are they worth? I have a buddy who is interested. I know that they do not work well in 360's and that is usually what I go for