It was mentioned earlier that C.W.G.C. headstones where a standard design, however they are not despite similar appearance made of a standard material. When visiting Reichswald Forest Cemetery a few years ago the head gardener (IIRC a Canadian) explained that they had to use a different source of limestone due to the harsher German winter to that used in Normandy and this policy extended worldwide taking into account of local climatic conditions. Further this may explain why in the two cemeteries in
Kanchanaburi (Thailand) tablets are used and not headstones, also the Gallipoli cemeteries use tablets.