This Brass-tone Hinge is an offset hinge typically used on overlapping top guitar cases, like an acoustic case, or certain Gibson and Martin cases.

The leaves are unequal. It is 1" across the pin X 1-7/8" wide.

It has 4 holes .160" Diameter on 1/2" x 5/8" centers.

The bent tip on the longer leaf cradles the top edge of the case for extra support.

LAST PIC IS OF A USED HINGE I BOUGHT ON EBAY FOR $14.00. 

  SELLER SAID IT CAME FROM A 1959 LIFTON CASE. 

 IT IS IDENTICAL TO THE ONES I HAVE