To the OP, that sounds like a good deal. That is desirable gun, and they aren't making any more of them. Be a nice present to yourself, along with the Dirty Harry boxed set
You might have to sign in to see this, but here's a good source of information:
the FAQs
"Post-War S Series N frames:
S62,489 – S67,999……..1946 - Early 1947
S68,000 – S71,999……….Late 1947 – Early 1948
S72,000 – S72,499……….Late 1948 - Early 1949
S72,500 – S74,999……….Late 1949 – Early 1950
S75,000 – S80,499……….Late 1950 – Early 1951
S80,500 – S85,999……….Late 1952 – Early 1952
S86,000 – S94,999…….…Late 1952 – Early 1953
S95,000 – S102,999…….Late 1953 – Early 1954
S103,000 – S139,999……Late 1954 – Early 1955*
S140,000 – S149,999….Late 1955 – Early 1956
S150,000 – S175,999……Late 1956 – Early 1957
S176,000 – S181,999……Late 1957 – Early 1958
S182,000 – S194,499……Late 1958 – Early 1959
S194,500 – S206.999……Late 1959 – Early 1960
S207,000 – S219,999……Late 1960 – Early 1961
S220,000 – S227,999……Late 1961 – Early 1962
S228,000 – S231,999……Late 1962 – Early 1963
S232,000 – S235.999……Late 1963 – Early 1964
S236,000 – S257,999……Late 1964 – Early 1965
S258,000 – S261,999……Late 1965 – Early 1966
S262,000 – S289,999……Late 1966 – Early 1967
S290,000 – S304,999……Late 1967 – Early 1968
S305,000 – S329,999……Late 1968 – Early 1969
S330,000 – S333,454……Late 1969 – Early 1970
*Note that a number of N frames with serials in the S138000-S140000 range (and the range may be wider either way) are seen that were shipped much later than the serial would suggest should be the case. In one known example a gun with serial S136431 was not shipped until June of 1958. It's possible that a large block of serial numbers that appear to be from 1954-55 were not actually used until 1957-58. It at least one case a gun has a 5-screw serial and was built as a 4-screw gun.
N Series N Frames:
N1 – N60,000………….......1970-72
N60,001 – N 190,000…...1972-74
N190,001 – N430,000…...1975 – 77
N430.001 – N 550,000…..1978
N550,001 – N580,000….. 1979
N580,001 – N790,000…...1980
N790,001 – N932,999...…1980-83
..................................................."
Section continues on K frames, etc.
hth, Merry Christmas everyone!