Williams chrome legs with the shorter support ribs (9 inches) used on many System 11 and System 11B machines.
Used on the following games:
Swords of Fury
Black Knight 2000
Transporter the Rescue*
Elvira and the Party Monsters*
*Although these games came from the factory with short ribbed legs, some of them may not have been chrome plated, but painted gray.
Williams reference #01-2263-2, 01-2263-3, C-10843-3.