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I believe this numbering system was up to at least 1970.........
Dave

Dave,
I too was pondering the mystery of the pre 1960 s/n. Perhaps we are
never meant to know.....
Richard

--- In hp_agilent_equipment@..., "daveolla"
<grobbins@n...> wrote:

Greetings,I understand how the series date code such as 01A2012
operates as exlained in several HP manuals,01= condensed series

code,

with the number incremented when a change is made, A= American

made,

2012 = 12 week of 1980 (1960 + 20).
However I have not been able to locate how earlier codes
operate such as 601-05378 or 078-04485. Could some one explain how

to

break this code? I gave a search for this in previous messages, and
was surprised that no one has queried this before.
Dave

Greetings,I understand how the series date code such as 01A2012
operates as exlained in several HP manuals,01= condensed series code,
with the number incremented when a change is made, A= American made,
2012 = 12 week of 1980 (1960 + 20).
However I have not been able to locate how earlier codes
operate such as 601-05378 or 078-04485. Could some one explain how to
break this code? I gave a search for this in previous messages, and
was surprised that no one has queried this before.
Dave