WHAT IS IT?! Here's an odd valve I was given . . .

[CharlesWaugh]

OK, I admit it, this isn't 'really' Tool Talk, but you guys know everything...

I just got given this valve. It's way cool, but is missing a piece (which is fine, 'cause I'll make it into a table or something www.redirectedmaterials.com)

It's a very mildly magnetic stainless (I guess), but is vaguely yellowish/brass-ish in color.

It weighs a ton! Well, really only 14 pounds...

It has been beaten on on the handle flange (see pics).

It is has three ports and can go A-B or A-B-C, but won't do a shut off.

The ports are about 2" dia.

The threads on the ports are Acme.

It has two markings on the main body (see pics): 3LK57 and -2

W H A T I S I T ? ?

Thanks!

Charles