Purchased these from eMedals in early August. Neither is maker marked. The one on the left is cast zink/copper and was advertised as coming from the collection of Thomas Durante. The one on the right is silvered zink and has a left-opening catch. The silver finish is in very fine condition and brighter than any others I have so I picked it up.
Thanks to Ralph (rbminis) and Tom himself, I now know the makers are Deschler & Sohne (left) and Alois Rettenmaier (right).

Click to enlarge the picture