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In Reply to: RE: 5687 id? posted by mashley on April 14, 2012 at 15:55:50:
Well Tung Sol in the 1950s was easy. Your "550" code means 50th week of 1950. With some Tung-Sols, you will have the 322 before the number which is simply the factory code. If memory serves, in the 60s they went to a code like "6236" which would mean 36th week of 1962. Some of this information may be on the web.
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Follow Ups
- RE: 5687 id? - JNS 17:43:04 04/14/12 (0)