Excited to have found this 246B. Still have to get it onto my own hands. The fount bottom appears to be painted with aluminum paint and is otherwise in good condition on the face of it. Tryin to figure out the date code. It appears to be 0/12. Can that mean 1940 or 1930? Or the “0” could be a “6” making it a 1936? The vent nut is not what I would have expected?