hankry242:

Best ashtray ever… 3”.50 from the USS Iwo Jima LPH-2, circa 1987.

🇺🇸⚓️🇺🇸

Okay so in naval guns, “caliber” or “calibers” is a measure of length. A 3"/50 calibers naval gun would be 3" in nominal diameter with a 150" long barrel.