Hey guys, I'm in need of some help. I recently bought an I.J. and have no idea about it aside from its probable caliber which seems to be 32 s&w.The serial number is D66262. I had read a post in another forum that the D prefix was for models chambered in 38 but 32 seems to fit fine. It's a six shot 3" barrel with no caliber markings on it, but has the patent date on the very bottom of the frame as Pat Nov 17 08 and on top of the barrel, Iver Johnson Arms and Cycle Works Fitchburg Mass USA. Something else I found interesting is that the grips are like a brown translucent plastic that seems to change with light brightness. Any help will be appreciated and I'll be getting my own copy of Bill's book in the near future. Thanks in advance!