Hello all! I got these binoculars from my granddad a few years back, and I thought you all could help me identify them. I'm 85% sure these are WWI, but I could be wrong. The serial code reads "Serial Code E E 23800". There is also a name on it, reading "JOHN C. VOLKA CAPT. 166TH INF." I can't really read the maker stamp, but I will try reading it later in better light. Opinions are welcome!