Many thanks all, it was and is a fun piece. I still need to dig in the archives for drawings and plans. It was all manual drafting back then. I've found a couple of snapshots of it during construction and took more when it was apart last week, which I still have to download from the camera...
Gluing up one of the panels:
Shaping panel with a hand plane. For the insides of the panels I made a japanese style (pull to cut) curved sole plane. Rest was done with scrapers:
I may have more photos from back then. I've been slowly converting my photo archives to digital so they could be in the "not done" pile.