water pump superwrench

[HeelSpur]

Got this Williams water pump superwrench, checked AA and it states that it has Chrome-Molybdenum stamped on it, but mine has Alloy stamped on it. They have both kinds stamped on different wrenches but I take it that any of them can have either Alloy or CM, or is this a mistake?

http://home.comcast.net/~alloy-artifacts/williams-supercompany-p3.html