early Lyman 48C receiver sight

Old style Lyman 48C model receiver peep sight.   I believe it is intended for Mauser type actions but have seen them mounted to Win. 70s.    Condition is fair;  very little blueing left but adjustments work properly.   It ain't pretty,  but still effective.   A real steel,  age appropriate classic for the price of a modern alloy knock-off.    Asking $120 mailed from eastern Ont.