The C.1928 Watson And Sons Military Issue Field Binoculars are a rare and collectible piece of history. These binoculars, with a maximum magnification of 10x, feature a Porro Prism optical design, making them ideal for military applications. The Watson And Sons brand, known for its quality and craftsmanship, ensures durability and precision in these field binoculars, making them a valuable tool for any collector or enthusiast of telescopes and binoculars.