Flat hook in white metal. Has two female press stud fasteners for attaching it to an early type C, D or E helmet thus allowing the use of a type E*, G or H mask. Also for use with modified type-B helmets. Correct wartime pattern and not the later postwar types used with the F & G-type helmets. Complete with screws/nuts for a more secure fit. Very good used condition. Stock code O20474.