Man, that is SWEET...
Harrington and Richardson... I have an old bolt action 20g shotgun from them. late 1940s vintage.
Been around a long time.
I’ve heard it has hellish recoil.
I’ve got a fancy Pedersoli Sharps... very comfy to shoot with lighter loads.
‘bout had a coronary when I bought good sights (Montana Vintage Arms) sights for it... cost half what the gun did.