deskthority

The latest addition to my slide rule-collection : Aristo 968 slide-rule,
'semi-re branded' for
Joe Klawun Feinmessinstitut in Hannover .

Production-code '505' = 1950 !!
and either 'May' or 'Batch 5' .

This classic sliderule was introduced sometime in 1949 and evolved into the workhorse-rule of Continental Europe,
right until production ceased in 1978 .
More than 2.5 million were produced under the 'Dennert und Pape'/'Aristo'-brand and the design was copied
World-wide in huge numbers .

Made from 'Aristopal', a special PVC-formula devised by German plastic-engineers,
in the rubble of Hamburg, West-Germany, 1950 ..
The scales are engraved, filled with colour and then polished .
(Math-geeks will notice the absence of a 'D'-scale on the reverse-side of this early Aristo-rule !
VERY 'un-usual', to say the least ! )

Sliderule ?
WTF is that ??
http://www.oughtred.org/books/AllAboutS ... 121001.pdf
( 25MB pdf-download )

Hmm, I'm not that much of a slide rule geek, but what would be the pro of not having a D scale? Isn't that the most used scale on a typical slide rule? I mean, on this one you can use the A and B scales, but the precision should be lower than when using C and D.

RC-1140 wrote:Hmm, I'm not that much of a slide rule geek, but what would be the pro of not having a D scale?

Probably none, since the later 968 versions put it back.

Peter wrote:Made from 'Aristopal', a special PVC-formula devised by German plastic-engineers

That stuff is neat. It's flexible, still, as well as durable.

I have an 868 and 970, but not that early.

The only slide rules I own are one Aristo Scholar VS-2 and a Faber Castell Schul-Disponent. Both are originally for Students, so they are not so advanced.