Kettenkrad & Infanteriegeschütz "Püppchen", Roskopf, 1:100 ???

Today a new purchase for my Roskopf-Collection. A "Kettenkrad" with a light infantry gun called "Püppchen". The Roskopf- Range is normally 1:100 but this one seems more like 1:87. You can compare it with the Kettenkrad from Academy in 1:72 in pictures 3+4.