I ordered the how to DVD (overhauling treadles) from treadle-on today, and had a short email discussion with Capt'n Dick. Seems a very pleasant and helpful fellow. Although he specializes in singers, I should be able to get some help for mine as well. Mine is a 'Helvetia' purchased by my grandfather at the Swiss Sewing Machine Factory Helvetia in Zurich, on 4. August 1938.
He paid 405 Swiss franks for it, minus 20 franks for paying cash on sight, and minus another 25 franks for the exchange of a singer sewing machine.
The machine has an oak table, a central spool and a special "zig-zag machine". This looks a lot like a walking foot.
I'm really looking forward to sitting out on my balcony this summer and sewing a quilt on the treadle! That is only project Nr ??? on my list.
Well, I can always make it a mug rug or five...