Colt offers history letters.
made about 1904
about 1908
100-700 USD
Impossible to answer without the serial number. You can also contact Colt
your colt 25 cal semi-auto was made in 1972.
100-1000 USD depending on EXACTLY what you have and its condition, accessories, box, papers.
price depends on overall condition. check at GUNBROKERS.COM look under colt 25 cal. your pistol made about 1922
50-550 usd
No
the colt mark 4 is a 1911 model pistol acp (automatic colt pistol ). 80 series was made during the 1980's but was not made in 40cal. from the colt factory, only in 45acp and 38 super.
Colt Peacemaker refers to a revolver. 70 series pistol in 22 refers to a semi-automatic. Which one do you mean?