I have started a new page entitled "Hilgen Artifacts." On rare occasions Hilgen cabinets have been found to contain documents of various sorts. Of particular interest are notes written by Hilgen employees when completing inspection of amplifiers or preparing them for shipment. However, I have found one warranty card and - if my luck holds out -- I may be receiving a schematic next week.
If any Hilgenite out there has found similar documents or notes, it would be extremely helpful if you could photograph them and send me the photos for display on the site.
It is touching to be reminded that actual human beings with names like "Lucy" were building these amps in the mid 1960's.