i just found this old camera in my grandparents attic. it has no markings on it whatsoever to indicate a maker or a year. i’ve been researching it trying to find anything that looks like it and have had no luck. it’s made of wood and is a simple box- no accordion pull out or anything. the lens moves around then front of it by wood panels. the lens can be pulled out of it completely. there is a viewer inside of it and nothing else. the backside is mostly open with a slot for the glass slides. can anybody help me figure out what it is or what year it’s from? we’re starting to think an individual made it on their own.