These make great replacements for your damaged 7x50's. They fit the B&L WWII Mark 15, M16, and M17 binocs. or you can use them to make a quality monoscope. In mint original condition! This is the 5 screw, waterproof model. Measures 5-3/4" long, quality machined pieces! There are no optics in these. Our B1153 prism assembly fits this.