Short answer- you don't. This is due to the design of the gun, and is not "fixable" without redesigning the gun. Sorry-
The Talon model 10 derringer was manufactured by General Precision Corporation in Waterford Ct.
The maker of your Derringer is no longer in business. Sorry-
125 usd
100-200
$75
There is no model number. The model name is Cobra. Are you talking about the serial number?
boat the gun and pull the triger and pull the poat back and out
His first model was produced in 1852.
100-200 USD
100 USD or so
$50-$75.
50-100 USD