Incidentally, I just got the unrestored chassis for my H840CK15 in yesterday, and installed it with a dud 15G courtesy of Steve and the ETF Museum.
Mine's pretty much a display piece without a good 15G, but I'm fine with that
Chassis number is ME000551. Missing the mask and knobs, I plan on repro-ing the mask and locating knobs when I get a chance. Lower chassis is present, but not photographed.
Incidentally, the chassis came with this interesting brand new transformer. Not sure what it is....