I would note that the Tippa S continued under Royal/Litton through the late 70’s in the form of the late Royal Sahara: https://typewriterdatabase.com/Royal.Sahara.72.bmys and Royal Caravan: https://typewriterdatabase.com/Royal.Caravan.72.bmys (Made in Holland)
https://munk.org/typecast/2015/12/26/gossen-tippa-serials-updated/