Hello Rain, The Serata is the treadle on my "How to Treadle" video. It was manufactured by Bernhard Stoewer in Stettin. You will probably enjoy the website
www.stoewer-museum.de
My husband has just walked in so I am showing him the jerry can article - it's just up his street.
I think I could start a whole new thread - Ingenious Features on Vintage German Machines. Interested?