This toy is almost 100 years old, patented in 1916, this little baby tank has instructions on how to use it underneath. I found it in our cabin in the mountains, my father in law was a huge WWI collector.
It measures 2 3/4 in long x 1 1/4 in wide x 1 in tall, I do not know how to wind it and suspect it needs to be cleaned/oiled if it will work
Materials: Wood, metal.