Deciphering European tube date codes

A lot of questions have been asked about when a tube is made, so here you go, a quick guide on how to decipher the date codes.

For the most European tubes made after 1955 date codes are located on the bottom of a side wall of a tube (not always the case)
Location of tube date code
In this case it’s B0D (this is for Mullard, Blackburn – 1960 – April)

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