The number on the bottom of the grip frame (588xxx) is the serial number, and that's what you use to date it. Best I have is:
1962 = starts at 295000
1969 = ends at 786544
So you're in the right ballpark.
Someone here may be able to narrow it down some.
Last edited by DAinTX; 07-19-2013 at 10:48 PM.
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