WIL TERRY said:
SHUCKS, I thought the 500000 block of serial numbers was reserved for SUPER SINGLE SIX guns only. hmmm....
You are right on Wil, they were.
The Super Single-Six came out in November 1964 with a reserved Single-Six serial block beginning at 500000. Then in Mid 1968 when Ruger reached 499999 in their fixed sight Single-Six series, they kept right on serial numbering to 505140. Then I suppose "all you know what" broke out at the factory when somebody realized they had nearly 5,000 guns sitting there (some were shipped out before the error was caught) that had to be stamped with a "D" prefix. They must have had several employees doing the stamping because there were at least three different "D"'s used.
Today I know of two fixed sight guns that never got the "D" and were shipped before the error was caught, 500075 and 500421, so there may be up to 300 guns out there for you guys to find that never got the "D" treatment.
Chet15