Sorry for the late reply,I've only just got here..As stated the Leopard 1A4 was introduced in 1974,most serving with the 10th Panzer division,based in Sigmaringen.The Bundeswehr 3 colour camo scheme was introduced in the late 1980's and isn't appropriate for the Leo 1A4.However,many BW vehicles on excercise had mud applied as a temporary camouflage. The base colour isn't green,it's actually olive drab with a greyish tint,(infra red reflective,apparently).The closest colour I've found is Tamiya Field Grey.BW Panzer divisions certainly used M113's,but I doubt they would have been transported on the same trains.If you need any more info,I can probably bore the hind legs off a donkey given the chance..