Hello, I'm wondering about the transition of the 110 model manufacturing from Chicopee to Westfield. The early 110's ('58, '59) have 4-digit serial numbers, the featherweight barrels, and deep-set bolt face, and all examples I've seen have Chicopee address stamped on the side of the receiver. Westfield mfg have the address on the barrel.

When 110 mfg started in Westfield ('60-'61?), it appears that's when they eliminated the protruding bolt face and the featherweight barrels that received them (?).

I have an early 110 in 22-250, 4.5" short action with DBM, it seemed to have no serial number, but there is an RD69xx number stamped at the rear end of the receiver, hidden by the bolt shroud. I was curious if this might be an R&D rifle made as part of the Westfield factory set-up for 110 mfg.