EPL 140 was the string drive version of this toy and was one of the very first toys Lehmann produced. Due to its success, it was not surprise that a windup version would follow. Here is the windup version with original box made from 1928-38. The ads said “Porter, walking naturally, with handcart. “ This toy was renumbered as EPL 770 and reflects subtle differences aside from the mechanism. The wheels are the standard two piece type with eight spokes. The firm, original box has directions on the top in both English and German that reference the “auto brake” feature of the mechanism that allows you to lift the wound toy off the table without having to hold the wheel to keep it from moving.