Vintage Chrome Oil Breather / Filler Cap circa 50's 60's fits?

Description

Up for auction is a used factory chrome plated  oil breather / filler cap circa 50's 60's applications unknown. Cap measures 2 1/2" outside diameter at the center. Tube opening is 1 1/2" inside diameter overall height is 2 5/8". Solid cap no rust or dents spring clip is good plating in decent shape clean unit. Taken off and stored inside for years, please check your applications before bidding. Any help in a positive I.D. is appreciated. E-mail me with any ?????????
ITEM #B9232