26 Feb
1999
26 Feb
'99
8:21 a.m.
Upon the date 12:40 PM 2/26/99 -0800, Sellam Ismail said something like:
Does anybody know when Hewlett-Packard made the Model 130C oscilloscope?
Its tube based. The serial number is 503-03353.
Sometime just after the 3rd week of 1965.
Rule for deciphering HP SN's in the above format as tought to me by a
couple of different HP service engineers and other written sources:
Take the numbers preceding the hyphen and add 6000. Result gives the first
two digits as the year and the second pair is (usually) the week of
production. Numbers after the hyphen are the serialized number.
1834A-xxxxxx is some unit built around 34th week of 1978, for example. Note
the "A". Can't recall when, but the nation of manufacture is depicted by
that alpha character. A is USA, J is Japan for example.