Is your gun a bolt action shotgun? If so probably a H & R. What gauge? Is it a 20 gauge?....an if so, then it is probably a model 121 H & R made for Sears for the J.C. Higgins line name.
Sorry but i don't have a clue about it's manufacture date, but the link below shows a book that may interest you.

http://www.booktrail.com/Guns_General/DOMHarrington.asp