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According to proofhouse.com, the Colt frontier scout depending on the model should have a letter Q,F,K or P following the number. They ended in the 1970's and none show a number as high as 335351.
About 94 yeaqrs okd. Made in 1917.
No serial number given.
If that is a Colt frontier scout with a suffix F after the serial number, it was made in 1962.
1888
1899
Probably Colt
1882
1903
about 1892
1907
about 1960