On Tue, 10 Dec 2019 19:23:14 +0100, Thomas Prufer
wrote:

On Tue, 10 Dec 2019 09:54:07 +0000 (GMT), charles
wrote:

mine was also an Aristo, but not Scholar - ISTR Studio; Not sure where it
is, though,

For all of you wanting to put some data behind that "ISTR", here is an online
collection of ~500 slide rules, including such gems as slide rules with an
adding machine on the back! Well, an "Addiator", adding machine where you move
rods in slots with a pin...

http://public.beuth-hochschule.de/~h...les/index.html


Thomas Prufer

My slide rule is the Aristo Scholar 0903 version A according to that
site, in a grey cardboard case. The reverse side is blank except for
English and metric rulers.
--
Dave W