After about an hour, it was back in one piece and running again.
This machine has a very nice mechanism that raises the machine above the main surface for free arm work, so it must have at one time been mounted in a cabinet or table.
Here are a couple shots of the mechanism linkage. Not much to see but it's all well-made with bronze bushings as pivot points.
This machine has a date stamp of Sep. 1983, which pretty much nails down the time frame it was made.
Made in Switzerland. The black thing is the air tube from a bulb on the floor that you press with your foot to regulate speed. A bit odd (and probably expensive to manufacture).