20mm wide leather strap for German binocular cases (not the binoculars themselves). These are one of the most difficult original pieces to find- they have been heavily used and most often are dry rotted or broken. These work on most cases- they are correct for 6 x 30's and 10 x 50's, and probably others. We have made these from heavy 8 oz. cowhide, blacked and treated. The roller buckles are actually originals- we had to strip and repaint them. Hand sewn with black linen thread. Identical to the originals. (There are several minor variations, but this appears to be the most typical.)