Impossible to value a weapon with just the caliber and serial number to any degree of accuracy.
1200
No published sn data.
10-100 usd
50-150
10-100 usd
50-450 usd
depends on overall condition
No published sn data.
such black powder revolvers are anywhere from $150 - $250, depending on condition
41 or 42 ? about 350 $
Assuming excellent or unfired condition, $400 to 500.
1gran per caliber