Treadle&gears, I saw something about Viscontea shutting down around 1952. If this thing is rebadged for a retailer, is it possible Necchi took up a production contract? Certain bits look to resemble the Necchi than the Visnova. Please don't take me as argumentative. I've come here to seek those who know more than me. The only marking on it is the number 2529 (I think) stamped on a boss under the operator's side of the plate. I don't know if it's any clue, but I did find interesting the drive from the upper shaft to the hook shaft below. It is two textile strips linked by wire links forming a toothed belt. Then the hook shaft terminates in an enclosed 90 degree gear below the bobbin housing. Looks very nicely built.