I assume that oyu searched on HP 5086-7249 and found the following URL. It is a calibration service that might be willing to share some information with you if you contact them. Or not.http://www.calright.com/_coreModules/eS ... sterID=920
This appeared in the closed auctions on e-Bay (maybe that's where you got it?). It at least provides info on where it came from.
Hewlett Packard Modulator/Amplifier P/N. 5086-7249 Removed from 86240B 2-8GHz RF plug-in.