your colt cobra was made in 1968.
No serial number provided.
Early 1969.
Your best bet it to call Colt.
Impossible to answer without the serial number.
The sn you list does not appear in any published data. Call Colt.
around 1951.
This is a '74 Cobra' according to the Colt Cobra Serial No.Table: S/N F60001 thru S/N F99999 were all manufactured in 1974. - HarleyNiteRider
1974. All Cobra and Commando revolvers made that year began with F6 . . .
Don't know value, but made about 1975.
Made in 1951, second year of production.
Your colt cobra dates to the year 1969.
According to Proof House your gun was made in 1974.