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Re: Hp 400D serial number decoder

 

Early HP serial numbers did not use a date reference. All we can tell is that it was before 1960. When I get up, I¡¯ll see if I can learn when the 400D was introduced. For now, my guess would be ¡°late 1950s.¡±



On Mon, Aug 29, 2022 at 11:04 PM Dave Miller <ve7hr@...> wrote:

A 400D found it¡¯s way home tonight.?

I am trying to decode serial number to approximate its vintage.?

Serial number is 16210.? That does not seem to fit into any of the decoders I have found to online to date.?

The online manual I have found does mention that serial number range but the is not copyright date on the manual.?


Thanks
Dave

--
Jeremy Nichols
6.
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