I am trying to identify the correct vehicle markings for a DUKW restoration I understand most of them but not the significance of the number on the Arms of Service square. Wikipedia offers some explanation but it appears incomplete. So far from contemporary photos of RASC vehicles I have 377 Company - 1392, 168 Company- 517, machine at Duxford (? company unknown) - 1346, and 297 Company (?) on the DUKW with King George VI - 54. Does anyone have a list of these or know where to find one please? I am interested in 168 Company when it operated amphibians within Operation Overlord, at Normandy and in Holland/Belguim in autumn/winter 1944.