You don't provide a serial number.
No sn data in the public domain.
Check the butt and receiver.
No way to answer without a make and model. Serial numbers aren't unique to one firearm.
Impossible to attempt to answer with no information on make/ model. A serial number is NOT unique to only one firearm in the world.
Impossible to answer without knowing the model and who made it.
20-80 usd
10-30 usd
10-30 usd
Which a single shot mississippi, split breach, vest, double derringer (model 95), caliber, variation? I'm suspecting your talking a double derringer 41 rimfire but that's likely not even a serial but a batch number. There's over a dozen variations with a HUGE range in value and even that's greatly dependent on condition.
.22 WMR-MAG Type 3 DM101Color Blue Black/ Catalog# 9194/ Dates 1982 1984 (Lowest serial number D03,832) To (Highest serial number D96,098V)
Depends on (real) type and condition, condition, and condition. I assume you mean a double derringer (model 95)? Where did 1866 come from? A type I model 1 couldn't have a serial that high. (and that's the only one made in 1866) A type I model 2 doesn't have a serial no but a batch no A type II model 3 may or may not have a serial based on which variation it is but that's starting in 1888.