WM20 356 (with matching engine and frame numbers) was an M21, according to the frame book sent to Forsyth in Cairo in November 1939 but there is a duplicate entry in the engine book saying that it went to the War Office in London in May 1940.
It may therefore have been a cancelled export order that was re-directed. The BSA records are a mess of duplicate entries.
Do you know how your bike came to be in the The Netherlands ?
You are a smart man Rik, I only had taken a look in the frame book. It seems to have been in Egypt anyway as some of the gaskets had Egyptian text on it, Hussein translated it and the gaskets were made from a sugar box.
