Actually,
These units, model 91, was made HERE until 1960. Then, it became 913, from Perivale...from 1960- through 1969, with only a few changes. This info was retrieved from North Canton documents. The 7037, having the same shape, still had a light, but was covered in rubber. It's so easy to get all of this confused, I do it all the time. But, I just checked. This info is straight out of HOOVER's archives. Hope this helps.
John