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Interesting serial number - Printable Version

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Interesting serial number - AndiGer - 10-08-2016 05:33 PM

Today I used my HP 82104A card reader.
When I took a look at the serial number I realized it should not be valid:


57th week of 1980? What went wrong in those days? Did they forget to switch the year to 1981 and recount the weeks from 01?
Responsable manager still in X-Mas holidays?
Anybody recognized such a strange thing in the past? Are there also calcs outside with an invalid week?


RE: Interesting serial number - PANAMATIK - 10-09-2016 05:45 PM

For your model they used a lunar calendar or 1980 must have been a strange leap year

My HP-82240B printer 3653I50312 is manufactured 1996 in Indonesia. But they don't have an extra christmas week there, 1996 January 1st was a Monday and it was a leap year, thus the printer must have been manufactured at 1996/12/30 or 1996/12/31 based on the gregorian solar calendar.


RE: Interesting serial number - AndiGer - 03-12-2017 02:33 PM

These days we have another one on TAS, 2058S...