Re: Capacitor voltage rating
The Erie 1965 cat lists their Hi-K Tubular Ceramicons as 500V d.c. working and Flash Test 1500 V d.c. but their stated sizes do not quite agree with your pictures i.e 0.54" x 0.255" (13.72 x 6.48mm) and 0.8" x 0.255" (20.32 x 6.48mm) - the RS ones seem closer.
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George
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