Revox/Studer model 40 amp

I'm in the process of moving to Switzerland, and hence downsizing my audio system. Recently I bought a Revox/Studer model 40 (tube) integrated amp in Switz that is currently residing with a friend until I bring it back to the US for a re-tube and tweek. Does anyone have a tech manual for this amp, or point me in the proper direction. Revox USA and DE don't seem to know this amp ever existed...
Any info, pro or con, would be appreciated
Best Regards, Ron