Probably between $1500 and $2,000 depending on condition, matching serial numbers, etc.
made by Ithaca in 1945
your pistol was made by Ithaca Company in 1943. Value depends on overall condition...
AFAIK, Ithaca never made a 25.
your 45 pistol was made by Ithaca in 1945. if your slide reads Colt that indicats someone put a colt slide on your Ithaca frame, which is not unusual in the military. value depends on over all condition.
made in 1912 by Colt OR Remington Arms. value rather high but value is based on overall condition. possibly $1500 more or less
it was made bu Colt in 1918. your slide is probably marked 'Ithaca' which was probably due to fueld cleaning. when pistol were put back together all parts were mixed. the Ithaca slide did NOT go back on the Ithaca frame, it went on yout Colt frame...........
1500
It is impossible to value a firearm with just a serial number and no other data.
1942
100-400 USD
about 1958
50-200