This is Chinese. The characters 话 talk, 出厂 leave factory and 机 machine
are in the simplified style adopted by the People's Republic after the
Chinese Revolution, but not used in Japan. Korean War, perhaps?
Certainly not "very old." With that binding and such, this probably
dates to the early 1980s or so. Nonetheless, the increased interest in
collecting old stuff in China in the past 20 years has made some things
that were relatively common in the 80s ...
