Is anyone familiar with these capacitors?

[Mike_J]

I was looking through my capacitor cabinet for caps I can use in my AB763 - 1 project.  I came across the caps pictured below and am not sure where I got them.  I think they were pulled from a junked Super Reverb chassis from 1971 I purchased many years ago but I am not sure.


Thanks
Mike

[Ed_Chambley]

Cannot tell if they are blue or black.  In the early 70, Fender Super Reverbs had blue blobs, but they are not hard feeling.  Sort of rubbery when squeezed.  I always leave them if they are good. 

[Paul1453]

I have some just like that, that came out of my junk gear purchases.
They are hard shelled and every one I've tried in a circuit so far, has been good.   

[HotBluePlates]

Blue-dipped ITW caps were used in silverface Fender amps as coupling caps.