Autheticating Sylvania STR 415's?

[#2121313]

Can someone mention some points to look for when buying Sylvania STR 415's? Can someone even post a picture of one? I see them from time to time on eBay and other gear sites but never really know if I can trust them to be the real deal, any pointers would be appreciated.

Are Sylvania and Philips the same, are the somehow linked?

Thanks.

 

[Ken j]

These RCAs are relabeled Sylvanias. Notice the double top getters.

 

[#2121313]

Thanks Ken j, how would one know they are STR 415's, like how were you able to know they were labeled?

 

[Ken j]

The print type, size, and location of "6L6 USA" are exclusive to Sylvania's per a tube expert I talked with. I believe the Mesa labeled ones have the STR 415 printed on the tube.