Keith, the MAFVA list states that the range of RMY 484 - RMY 538 was given to Mk IVC & Mk IV AA and the absence of a commander’s cupola confirms this as an Mk IVC. RMY 924 was an A11/Matilda I according to that source and Peter Brown. The markings below the xxx are the mobilization number above the embarkation stripes. In Blitzkrieg: Armour Camouflage and Markings, 1939-1940, Steve Zaloga says: Each unit was given a four-digit code, painted in small white numbers. Below this were three coloured stripes, each 20.3cm by 5.1cm. The colour of these stripes would depend on the four-digit unit serial. The uppermost and lowermost stripes were derived from the third digit of the four-digit code, and the middle stripe was derived from the last digit. 1 Red 2 Blue 3 Yellow 4 Light Green 5 Grey 6 Buff 7 Red oxide 8 Service colour 9 White 10 Brown Does anyone have a register of the unit/embarkation codes/dates/ports of departure & destination/etc.? Edit: Pipped at the post Rich.