[time-nuts] Cesium beam tube on eBay

Bdale Garbee bdale at gag.com
Thu Sep 8 10:10:25 EDT 2005

On Thu, 2005-09-08 at 09:57 +0200, Magnus Danielson wrote:
> serial number 1924A02909

If I recall correctly, HP serial numbers of that vintage are YYWWCNNNNN.

YY is the year expressed in years since an epoch, usually 1960.  So 19
means 1979.

WW is the week of the year in which the last manufacturing change was

C is the manufacturing location, A means USA.

NNNNN is a sequential unit number.


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