Produced in 1934.
Can't tell the caliber from just the serial number.
Impossible to tell from just the sn. if you found the serial number, you will be able to find the caliber of the pistol somewhere carved in the metal.
A Colt official police caliber.22 with the serial number 1478 was made in the first year of production ,1930.
1911
No way to answer without the serial number.
100-10000 USD
Impossible to answer without the model of pistol,caliber,overall condition,and a serial number to date the firearms production year.
@1914
@ 1972
That sn does not show up in published data for the ACE. Suggest you call Colt.
Impossible to value with only the serial number and no other details.
Need to know the caliber in order to answer.