11C with no serial number!?
#1

I just obtained an 11C which appears to have no serial number anywhere. Also, it differs from two other 11Cs I have in that the keyboard overlay has a matte (nonreflective) finish rather than glossy. The 11C logo on this unit has a bright silver (mirror) finish. My other 11C has a more of a matted silver 11C logo (the third one is missing the logo).

Does anyone know where I can find the serial number on this unit? It does not appear to be altered. I've inspected the area where I'd normally find the serial number carefully, but it looks clean and uniform throughout with no signs of alterations or tampering. The rest of the body appears the same (clean, uniform, no signs of tampering if serial# has been somehow erased).

This unit is very clean overall (maybe a 9.6) so it would seem it "should" be easy to find signs of tampering... but I don't see any.

Has anyone seen such an 11C (or any other Voyager series calculators with similar features)?

Thank you in advance,
Sam

#2

My guess is that this was a replacement unit sent out in exchange for one that was returned to HP for repair. I've heard that some of the calculators HP used for these exchanges didn't have serial numbers. It would also explain the other differences you mentioned, since HP often manufactured replacements even after the "for sale" units had gone out of production. Slight changes might be made after the regular production stopped, and so these differences would only be seen in the replacements, which would be less common than the production units.

#3

I have a HP16C with no serial number. I got it from its
original owner and he didn't mention anything about
it being a repair unit. Cosmetically it looks just like
the other HP16C I've got, with the exception of no serial
number stamped anywhere on the unit.

I'd also be interested in hearing if others have seen this on other Voyager models.

Regards,
Alex Knight
The Electronic Calculator Museum Web Page
http://www.calcmuseum.com

#4

I am looking for a users manual for my HP 12C??

#5

Could it also be possible that the HP serial number stamping machine spat out a few calculators with no serial number and quality control did not pick this up until some units had gone out?

If so I wonder how many 'escaped' with no serial number?

#6

I am looking too a users manual for my HP12C.
This manual is always sold by HP, but the price in France is prohibitive : # 35 $......
So, if you find solution, I'm interested...
Regards

#7

Hi,

for the mirror-like logo: These were used on the older machines. Later machines have the matted logo.

For the missing serial numbers:
I have an HP-41C with no serial number, and an HP-41 card reader with no serial number, too.
Their cases were replacement parts which certain companies could buy from HP for their special hardware extensions (W&W RAM boxes, etc.)
Empty printer plug cases w/o date code were available, too.


Regards,

Raymond



Possibly Related Threads…
Thread Author Replies Views Last Post
  Oldest HP 41c aka earliest Serial Number Gene Wright 23 5,589 09-05-2013, 03:45 AM
Last Post: Geoff Quickfall
  Serial Number Placement Matt Agajanian 3 1,372 07-07-2012, 03:26 PM
Last Post: Frank Boehm (Germany)
  HP15c LE - highest serial number over 23.000 Jose Gonzalez Divasson 1 1,159 05-16-2012, 03:19 AM
Last Post: Torsten
  A Most Unusual Number, on the 10c/11c/12c/15c Katie Wasserman 8 2,282 07-15-2010, 03:53 AM
Last Post: Katie Wasserman
  odd serial number on HP97S Alberto Fenini 1 974 03-20-2010, 11:25 PM
Last Post: Eric Smith
  HP-35 Bug: highest serial number? Mark Henderson 5 1,696 02-25-2010, 02:00 PM
Last Post: tomdrewski
  HP-41C with unusual serial number ? Marc Ferrer (France) 3 1,239 02-21-2010, 04:42 AM
Last Post: Marc Ferrer (France)
  HP 48 serial cable but no serial port in laptop juan demin 10 2,575 09-09-2009, 02:20 PM
Last Post: Patrick Rendulic
  Hp50g Serial Number Quan 3 1,428 07-05-2009, 11:57 PM
Last Post: Quan
  HP-41CV Halfnut with serial number beginning 2336 Dan Grelinger 2 1,077 09-29-2008, 07:54 PM
Last Post: Randy Sloyer

Forum Jump: