Appears to be a 1930s - 1940s Waukesha Industrial truck / pump / generator / motor  - one bank of a 6 cylinder head gasket - stamped VICTOR 686 and 9900-B and VR - ink written 6-KL-4 - never installed but is very dinged around from years of being in a warehouse inventory - good usable condition with minor corner dings, some heavy patina and some age separation as shown - one side has heavier patina from sitting and bent and dinged from storage as shown