Marlin OK Swing Barrel Derringer

-30 cal. RF
-single action
-frame: brass
-barrel swings out for loading & unloading
-SN# 16664 on frame beneath left grip
-walnut bird-head grips
-right side of barrel reads "JM Marlin New Haven.CT."
-top of barrel marked "OK"

No mechanical defects.  Action is crisp.
Wear commensurate with normal use.

Manufactured from 1863-1870