Anywhere from $25 to $25,000. Will depend on the exact model and condition. Sort of like "What is a 1968 Chevy worth?" A rusted Chevy Nova, or a mint Z-28 Camaro?
No US President was shot in 1875. Lincoln was shot and killed in 1865 and James Garfield in 1880.
Is should have the word "Colt" on it somewhere.
AFAIK, Colt never made a single shot pistol
1875
The pistol had six shots as opposed to the earlier single shot pistols. So, a Colt shot six times more then the earlier single shot pistols and rifles. The Colt brought reliability that earlier multi-shot firearms lacked.
The Colt 6 shot revolver.
5 shot, 38 spl, revolver I thought Colt only made 6 shot revolvers
the multiple shot revolver........................
winchester 1n 1875
Proofhouse.com has Colt sn data.
The Book of Colt Firearms has what you are looking for.
life was not long with 'one' shot..........life improved with the colt revolver.............