Re: Film of Erie Type 8 resistor manufacture
As far as production dates for the resistor types go, I have some type 9 Erie resistors in original cardboard boxes, a very few of which have date stamps. The boxes are not sealed though, and they came from a university lab, so I can't guarantee that they haven't been 'topped up' over the years.
The stamp legibility is poor but the attached picture shows what are, perhaps, the best two. The 7k6 resistors in the box dated 6 DEC 1944 are an unusual value so perhaps it's more likely that they were the ones which were originally supplied in that box ? They're 3-band with a khaki body colour. The other box is dated 14 JUN 194? (the last digit is unclear, but could be a 3 or a 5). It was for 12R resistors and there is indeed a mix of them in it - all 3-band with some on a khaki background and some on an off-white one.
Cheers,
GJ
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