Yep, I have a few coins and Marks as well. I have a 108mm round with the powder and cap removed. I have a WWII American Childrens Gas Mask ( I tried it with the original canister on it and I got messed up on it... the chemicals in it is a little old.)

It's amazing how this stuff keeps building up. Some things I find at small Flea Markets in small towns. The Vets pass away and there wives or family members get rid of the stuff at Flea Markets and on E-bay, and first thing you know... the dealers are off on what they are worth and my wife and I jump on it.

It's a good investment, but my wife and I collect mostly out of preservation reasons. I think the oldest thing we have is Suspenders off a Napoleon Army Uniform with the buttons and cloth of the pants still attatched. I try to keep it in a cool dark place in a cardboard box.