Today I got a Crosley 6SL7 made by Sylvania. It was advertised as a Westinghouse made by Sylvania from 1943. I don't think that the box below matches this tube:
I assume that the blue stamp was added to correct the misspelling of the word "Contracror" at the end of the Westinghouse line. Here is the tube:
On the glass is etched 6SL7GT and below, the letters EOM. The base has the number 312 which is the EIA code for Sylvania and the number 039.
EOM? Maybe May 1950/60? 039? Sept 1950/60? Don't know - but what matters is that this tube sounds excellent. Really good.
What about Crosley? Wel,l did you know that Crosley was the largest US manufacturer of radios in the later part of the 1920's? They made refrigerators, cars, TVs etc etc.
However, what matters most to us here on the Little Dot forum is that Crosley as early as1925 served as the inspiration of the styling of the LD amp .
The Crosley Pup radio cost $9.75 in 1925 = $130 today. Here is a happy early Head Fi-er.
Here is something for you sports fans out there:1925 CINCINNATI REDS SHARE HEADPHONES AND CROSLEY PUP RADIO MASCOT (Don't know if Messrs Zhe Zhe and Sword could afford such an advertisement today):
BTW, paid less than $5 for the tube.
Have fun!
Could not resist adding this picture of a 1947 Crosley cabriolet:
And a 1942 Crosley Liberty Sedan