German 10,5cm howitzer, case manufacturers


I just bought this 10,5cm hozitzer case on behalf of someone else. As I know less than nothing about the things I was wondering how many other case manufactures are known. I suppose the things were made by the million but the static nature of trench warfare would have allowed a degree of re-use or re-cycling.

Also, what types of projectiles were used, who or what was ‘HL27’ and why does the interior dimension of the case mouth measure nearly 11cm when the caliber is designated 10,5cm?

See … I told you I know nothing!

Happy collecting, Peter

Edited once for impossibly careless spelling