[An unkown capsule diode]

Hi, I'm new to the boards here.

I had purchased a second-hand casuple diode (58mm base diameter, 24mm height), but have no idea as to what its specifications are ???

Printed onto its ceramic side are the letters and numbers :
NL - R34B16B 9033

Engraved on its base is
CJ7771 118

Its maximum current should be quite large, but I don't want to risk frying it. ;D

Any help would be deeply appreciated :)

Thanks!