99F with an early 1965 serial number, but with a clearly stamped 1967 date stamp.

10889xx, 21U.

Interesting. All the serial number/date stamps I have for the 1960's are extremely consistent. This is definitely an oddball. For the 50's it'd be "ho-hum". Buttstock has the last 4 digits of the serial number of the receiver stamped in it as well, only a 2 character assembly code on buttplate/buttstock - no markings on forearm at all.

Last edited by Calhoun; 03/19/18.
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