Is there a way to pin down the age of a camera like this? I was able to pin down the age of the lens (a Ross lens) to between 1924-1925. However, the camera and stand both have brass plates stating that they were both manufactured by Graflex, Inc.

On the rear standard, lower left corner or bottom lower left corner is a 6 digit number. What is it? It will likely be stamped into the wood.