8uF Gudeman Hermetically Sealed Cap

[PB2]

Picture is a Gudeman 8uF 115Vac 200VDC capacitor that I got (QTY 8) surplus in, I think, the 1980s.
I think that I also have some Spragues that look exactly the same but maybe .5" shorter, same value.
115 Vac does this suggest a motor start or run cap?
I might use them in a crossover network if I could confirm that they're film.
Does anyone know if these are paper in oil, or film, they measure like a film in terms of value is
very close within 2% and DF is the same as a film.
Normally I'd throw these away but they look so darn high quality, thought I'd ask first.
The end terminals come out through what looks like glass.
Markings are value as above, and:
GUDEMAN
F54-019JT-10
72928-7101
Date code looks like 1971 first week. The picture brings out the surface imperfections, it is actually a nice shiny silver:

 

[JonSnell Electronic]

50 year old non electrolytic capacitor that has been unused is probably OK to use.
Looks like an early polycarbonate or film type. PIO were phased out in the 60s as they are unreliable and prone to leak under certain conditions.
Would I use it ... probably not.

 

[jan.didden]

These look very well build. The 2% tol also points to very good workmanship.
Motor run caps, it looks like it, normally have very high current and very low loss parameters.
If the DF and leakage are OK, I'd use it!

Jan

 

[PB2]

Thanks, thinking about this more motor caps usually have screw or spade terminals,
so not sure what the application was for these.

 

[jan.didden]

I know this type from the HAWK Air Defence missile system, but that's probably a long shot ;-)

Jan

 

[PB2]

I'm fairly sure that these came from WPI when they were cleaning out the lab IIRC around
1979, they were free.