Hello all! Strange thing up for sale today. This is a vintage depth meter used for divers to tell how far underwater they are! I have no idea if it works or not, as I do not have a large body of water to test it in. However the 19mm tropic strap is really in incredible condition! Asking for $90 for both the diving gauge and strap OR $50 for gauge, $40 for strap! Slips right under the cuff! 😉