Hi,
Looks like a split body ball valve..
Gearbox suggested it is quarter turn (12 o'clock tag seems O for Open and 9 o'clock tag seems Close marking).
Quarter turn usually ball valve, butterfly valve and Plug valve.
Guessing it was pre 1980's.
Not sure if this is ANSI class or WOG. Won't be surprise if face to face dimension is not as per ASME B16.10 standard.
It's a ball valve. Looks like 14" 150# (Class 150) ASME/ANSI flanges to me. Interesting they installed the stem in horizontal here with the gearbox on it. May be the way to go to flush out any junk/debris every time it's opened/shut.