7/22/20 - This is a potentially super rare Navy Mauser HSc variation that comes from the Tom Knox collection, and is documented in Still's Axis Pistols book, on page 175. It is a fourth variation pistol but also has an Eagle over M proof on the left side of the frame, and is the only such example that's been reported. The finish is original but shows some uniform thinning, especially on the straps. Terrific bore. Grips show minor age and handling wear, mostly on the right panel, but no cracks or chips.