Classic >1960 HP serials always mention the country
of production.
Format XX (year +1960) XX (month) Y (country code) XXXXXXXXXXXX (serial)
2823G123456 made year 1988 week 23 in Germany serial 123456
Indeed.
A = USA
G = Germany
F = France
S = Signapore
B = Brazil
Some others that I have seen
E = England
J = Japan
K = Korea
(The last 2 I've seen on monitors made by NEC and Samsung respectively,
but badged HP. They have an HP style serial number.)
I've alsoe heard that 'Q' was used for England at one point, but I have
never come across this.
Getting back to tape drives, the units I'ev looked at are, indeed made in
England (with an 'E' in the serial number). I've also just stuck a ruler
on the metal hub of the capstan from the 9144, it measures 15mm, and is
considerably more that 1/2". Of coruse a ruler is not as accurate as a
micrometer, but it suggests that my measurements from the latter tool
could be correct.
-tony