That serial number in not in published data for the Service Model. Recommend you call Colt.
Colt
Your colt trooper was made by colt at the end of 1968.
Your colt huntsman was made by colt in 1967.
Yes, Colt and others made them for Colt
Made by Colt.
your colt model 1911A1 was made by colt in 1944.
That Colt DS, A27000, was made in 1969.
Your colt was made in 1966.
Your colt police positive was made by colt in 1930.
Your colt police positive was made by colt in 1935.
Proofhouse.com has Colt sn data. If not there, you will have to call Colt.
Many have, primarily Colt.