SES Transistors?

[Kroars]

Has anyone heard of the manufacturer SES in reference to transistors (among other electrical components I presume)? I’m looking at purchasing some 2n404a’s but haven’t heard of SES before and am curious of quality.

 

[Betty Wont]

Siemens Edison Swan was a germanium transistor manufactured in the UK. I've never seen a "quality" germanium. They are either in-spec for my needs or out. Manufacturer doesn't seem to effect that. Culling does. The older they get, the more fragile the glass ones seem to get though.

 

[thesmokingman]

SES is Semitronics

 

[Kroars]

Thank you kindly. Germanium is still a bit of a mystery to me. Seems I need to do a bit more reading. I found an interesting looking article on the history of transistors that I’m looking forward to reading. Anyway, thanks again for the detailed response!