What type and make are these resistors?

I've picked up a parts cabinet full of these 1W resistors in various values for $10, but I'm not familiar with the brand or the type. The small holes in one end suggest to me they are wirewound, but I just don't know. Can someone identify these for me?

Thank you!
 

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Certainly not wirewound. A film type, metal or metal oxide.
To my knowledge, Sfernice and Allen-Bradley manufactured this type of resistor, but there must be many others.
The holes are a common feature, probably a manufacturing necessity or help, to handle the end-cups before crimping them to the body, or a gas release to avoid pressure-building during the manufacture.
 
Yes, mine look exactly like photos of Corning C-4 resistors I found online. Nice to have definitive information, and turns out these are quite useful to me in the values I bought. I estimate about 1,000 resistors, possibly more, and they are in values that I can use for my tube gear (audio and guitar).
Cheers,
Greg