I do not know what this is! And I do wonder. The page it comes from is this: http://www.griggs.co.uk/f15922.htm Going to the main page of the website shows it's a radio station. You can find this image when you go to 'QSL' page, where you see many more (dissimilar) cards. Does anyone know what this is about? I seem to recall we found something radio-related before... maybe a frequency that someone tuned in to that happened to be the number? Edit: Hey, I found another one of these, from a different website! https://www.qsl.net/jh0alb/card_swl.htm
I think it's time for me to make attempt number lost count to try to come back here... I'll look at all previous pictures again in a bit, but I figured I'd just first post another number. How about this? Oh, no number... Then I found this Minitrix set from České dráhy, the main railway company in the Czech Republic. Here's one with the number: And here's one with German information:
Aww, the number is cut off by the tree... :O :D Dierentehuis t Schuthok 15938 Zack Dijkgatbos – Dierentehuis t Schuthok