From the records I have, there should be a letter " D " prefix before the number. If so, D926000-D958499 were produced in 1967. if it's a trooper made about 1969
418306
1950
A Colt detective special with that serial # needs a letter either before or after it. Nothing that low before 1970
about 1936 (I believe)
1977.
Was produced in 1960.(750000-776399)
You will have to call Colt to find out.
I believe made about 1913
Colt Detective Special serial numbers do not end in two letters. If you are positive the last two are "RD", you need to call Colt.
Proofhouse.com has Colt sn tables. You can also call Colt and they will tell you.
your colt detective special dates to the year 1949 by the serial number provided.
Are you sure the serial number is correct? The Colt detective special was first produced in 1927 with a starting serial number of 331000,The Colt police positive special from which the Colt detective special was derived from with the serial number 153817 was made in 1918