Yep, Kartonowka happened to be the magazine published by GPM.
groetjes, Gert
This is an interesting coincidence because, after finishing the Mont Saint-Michel (Instant Durable), I intend to build this train as well. Not the 1/87 model you have but GPM's 1/25 scale model. It has over 4000 parts spread across 55 A3 pages, plus instructions. Not surprisingly, it will take a lot of time...
Just a remark - you say (and that is on the picture) PP51. GPM's 1/25 model is PP52 Pilsudczyk but the locomotive is clearly the same. Maybe someone can clarify this.
GPM offered in their magazine Kartonowka additions to their program but also new items.
For instance: Fokker D-VII regular program - Polish version; Kartonowka: German version
The Kartonowka version here is a scaled-down version from the regular program
Additions in Kartonowka: jerrycans, oil-drums, sherman railings, conversion-kit for a Zero-fighter (diorama: on flightdeck with folded wings), Sherman tank railings.
