Patented in 1915 these were highly regarded while in the 1940's. ➡️ Keep to the connection in my profile for info on wherever to obtain this and other astounding objects highlighted below on @physicsfun #motor #boat #toyboat #physics #thermodynamics #physicstoy #physicsfun #steamengine #throwback #throwbackfar #antiquetoy #vintage #vintagetoy #poppopboat #science http://alexo395kgc7.blogginaway.com/profile