Emactron 6CA7 = Sylvania 6CA7 Tubes ??

[N3m0 7h3 Fi5h]

Dear All Expert,

I need your opinion who has advance experience with Old Sylvania 6CA7 Tubes.

Local Seller sells some "Emactron 6ca7" tubes ..
http://imageshack.us/a/img43/8895/img00 ... 250814.jpg" onclick="window.open(this.href);return false;
http://4.bp.blogspot.com/-BLx7knfoLMw/U ... G_2887.jpg" onclick="window.open(this.href);return false;
http://3.bp.blogspot.com/-xIr4DSflFnI/U ... G_2886.jpg" onclick="window.open(this.href);return false;
http://imageshack.us/a/img502/6143/img0 ... 250813.jpg" onclick="window.open(this.href);return false;

Is it the same or Not, with Old Sylvania 6CA7 Tubes ?

Thank you ..

.

[axeman]

Those are not Sylvania 6CA7, Those have a kink running horizontal on the plates. China or Japan

[N3m0 7h3 Fi5h]

Thank you for fast respond ...