More historical trivia. I was just looking up something for a member of the VETE (Vintage Electronic Test Equipment) Facebook group and discovered this note regarding the ¡°000-00000¡± (vintage 1960-1970) serial numbers: ¡°If the serial number is prefixed by a letter, the instrument was manufactured outside the United States.¡±
Trivia: Serial numbers of the form ¡°09mmXnnnnn¡± can also appear as ¡°9mm-nnnnn.¡± Such instruments would have been made in (late, usually) 1969, when the change in format was underway. I suspect this was a practical matter: serial number tags would have been ordered in quantity and in advance of production. Production management, if several hundred of the old serial tags were in stock, would lean towards using up the old ones before bearing the expense of ordering new ones.?
On Thu, Sep 1, 2022 at 10:17 AM Mikek <
amdx@...> wrote:
I have two meters both older I know because of the AC plug.
?HP 3400A # 806-08346
HP 400E # 0949A11285
??? Thanks, Mikek
PS, I knew I saw a thread about this, I checked several groups I frequent and couldn't find it.
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Jeremy Nichols
6.
Jeremy Nichols