Best left to a gunsmith.
Not familiar with a Hawes Dueling pistol. However, they did make a top break .22 Favorite Single Shot Target Pistol- a reproduction of the Stevens #35, chromed fame, blued barrel. $100-175, depending on condition, made 1968-76.
value depends on overall condition. the break open pistol stems from turn of the 1900's, and are not in the real collectible world......................
Take it to a gunsmith.
The link at the bottom of this page will take you to the Ruger website for your pistol. You can download the owner's manual for your pistol, which includes instructions on assembly and maintenance.
What Model 51 pistol or a rifle and what model?
Find a good gun smith.
if a pistol, tnen the same way as the military 45 cal pistol
Find a gunsmith and ask for help
They don't really break. The internal seals deteriorate and fail. This results in the master cylinder not holding pressure. The repair is to replace it.
Impossible to answer.
Ask a gunsmith for help
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