Not much to add here. It's a 235kmaU from probably the 1962-1965 time frame. These were made from roughly 1952-1972. One of three known 84mm variants with the metal file, the other two being the 236kmaU (The Journeyman or small Master Craftsman) and the 135kmaU (small Grand Prix). Other variants like a small Clipper or small Grand Prix Jr. could exist, but I've never seen or heard of them.