Leather Expandable Case for Cigarettes

Here is a rather unique piece. This appears to be an expanding or accordion style leather cigarette case. It expands a lot, so much so, I question that it is really for cigarettes as it could probably hold a minimum of 4 modern packs and possibly up to 8 if you push it. It is lightly used and still in good condition. There is a locking mechanism on the latch but the key is missing. Marked inside Moritz Mädler, Leipzig.