The chains look grey, not green, in close-up.
http://archive.wizards.com/default.a...d/ag/20020816a
Spoiler: Half-Flesh Golem & Half-Clay Golem
Spoiler: Half-Stone Golem & Half-Iron Golem
The half-flesh golem has stitches - none of the others do. The half-iron golem's parts look much more mechanical than Serini's do though.