The olive drab U.S. Army Shade 7 cotton canvas "Suspenders, Individual Equipment Belt" (also designated "Suspenders, Field Pack, Combat, M-1956") were manufactured in Regular (FSN 8465-577-4922), Long (FSN 8465-577-4923), and X-Long (FSN 8465-823-7231) lengths to United States military specification MIL-S-40160. They are additionally adjustable in length by means of sliding metal friction fasteners. Early production individual equipment belt suspenders attach to the individual equipment belt by means of open bent-wire hooks which are attached to the individual equipment belt's upper set of eyelets, which these are. Later production individual equipment belt suspenders utilize closing hooks in the rear and open cast hooks in the front. The individual equipment belt suspenders feature a row of web straps over the shoulders for attaching equipment and each side featured a metal rectangular ring where the frontal web straps and the padded shoulder portion joined for additional equipment attachment. The underside of the padded portion of the suspenders is a thinner canvas in earlier-production suspenders and nylon in some of the latest examples.

All our stock is Regular (FSN 8465-577-4922) 
Don't ask me why but it is marked with the NSN 8465-50-577-4922 which would be the NCS code for Bulgaria.  
However these were made in Australia by Q.J.M. in 1960 and the wooden crate they come packed in is marked 8465-66-034-4051 07314 9/69.  Please don't expect to get the crate unless you order 60 

Please note: as these are military surplus there may be some colour, quality and style variation to the image shown.