Recently acquired the above shotgun. The toplever doesn't return to center when closing the breech. The spring appears to be missing or broken. Don't think it's gummed-up as the lever moves freely. A cursory search reveals no exploded views available. Brownells has flat spring stock.... Dixie gunworks has a few toplever springs for Parkers.
Anybody have any better sources? Or a gunsmith who could make a spring? Thanks, Grant.