I've been waiting to comment on this till I had some pictures taken of mine. These were called 'Featherlites' (Featherlights?). I received mine from Bud when he was back in Diamond Bar. They featured the cut in block and radius rounded edges on the body and sight rail. The serial number is inside the back block. These were never well known, even today.
I had this re annoed way back in the day. The grips Colin Thompson gave me, they were prototypes to see if anyone liked them. I don't think he ever made any others in camo. Hope this helps. If you have any other questions Bud would be the one to ask.