Thought I would share my map case collection so far. (Not sure if this quite the right section for field items mods?)
Hope to add to it as I put together my oberleutnant uniform.

What I have so far

My list of items I’m still looking for:
Deckungswinkelmesser
Kurvenmesser
Kartenwinkelmesser
Kilometermesser
Zielgiverttafel
Planzeiger
Wooden rule
Eraser
Fur der Wehrmacht pencils
Grease pencils
Pencil sharpener
Protractor
Map sleeve
Maps