There is some debate about the c/n of this air frame. Preserved F938 is former G-EBIC and 687/2404 is given by CAA to G-EBIC. It may be the case that large parts of F938 in the RAF Museum and F937 (ex G-EBIB cn 688/2404) in the Science Museum have been exchanged in the thirties, resulting in a mix-up of identity.