They are Mullard ECC88
Mullards should have a code somewhere not?They are Mullard ECC88
Bulk pack doesn't have itMullards should have a code somewhere not?
Thanks for the clarification on that. I was wondering why I couldn't find any codes. They are in otherwise pristine condition (unused).Bulk pack doesn't have it

You are welcomeThanks for the clarification on that. I was wondering why I couldn't find any codes. They are in otherwise pristine condition (unused).
Glad you like them, to my ear these are the best E88CC , nothing come closeThe light was not good when I made this photo, but anyway.
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Here we have from left to right: Philips "Amperex" ECC88 (GA2/◿9G) with D-getter, Telefunken ECC88 (B9207306) and the one decided it's a Siemens ECC88 branded "Hewlett Packard" without any code. All are nice, Telefunken is spectacular. These 3 keep me busy for several days already.
I have all of them too. I am just not sure the labels correspond to all the different plants. As an employee of RFT told me when I had visited the former GDR in the late 90s, some work was sub-contracted to them from the Soviet "management" and these tubes shipped (where?) unlabelled. It is often that I wish I was more scholastic and better equipped with both better language skills and a capacity for going deeper into things when I was young (and obviously a tad foolish...). Despite the lack of a clearer historical perspective, these folded plate RFT tubes sound incredible in driver and cathode follower positions. Just lovely...From reading around the internet it seems like there's four relavant RFT audio tube factories. I think I have 3 of them in ECC83.
VEB Werk für Fernmeldewesen Berlin-Oberschöneweide, Ostendstrasse 1-5, East Germany (= WF)
Muhlhausen, or VEB Röhrenwerk Mühlhausen, Thüringen, Eisenacher Strasse 40, East Germany (= M) (RWM)
Neuhaus, or VEB Röhrenwerk "Anna Seghers" Neuhaus am Rennweg, East Germany (= RWN) (Röhrenwerk Anna Seghers)
VEB Funkwerk Erfurt, East Germany (= W)
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In Spritube SanctubeIt's too late to regret the result of carelessness View attachment 158266View attachment 158267

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