That sounds about right, Ian. There's an entire BMW motorcycle production line somewhere in Siberia. The Russians got drawing and castings from Germany before the war, copied the designs exactly, tooled up and churned out hundreds of thousands of BMW clones. They basically built the same bike for 30 years with that tooling.
BTW did anyone notice what's on the wall in picture 6, on the other side of the pin-up wall - an Abacus! That wasn't for keeping score in card games. It was the shop calculator! I kid you not. Those guys cold do calculations fast, too!