VINTAGE U.S. DIVERS TANK TESTER BOTTLE GAUGE FOR SCUBA DIVERS- 4000 PSI

From the U.S. Divers 1976 catalog. "Tank pressure gauge w/bleeder. Check air supply before and after diving. 4000 psi service. High strength chrome plated forged yoke, anodized body. Shock resistant. Fits all valves. Has large convenient slip yoke knob."

Probably the best bottle gauge they ever sold!