Name that calc
rickb at bensene.com
Mon Jul 30 18:55:36 CDT 2007
It's a Deitzgen ESR-1. As your page says, it's an OEM version of the
Casio fx-1. Casio sold the machines to Deitzgen, who just put their own
modem/name/seria number tags on them, and was responsible for marketing
and maintaining the within their marketplace. Sperry-Remington also
OEM'd the Casio fx-1, and sold it under their brand name as the 1259S.
Quite an interestng machine. It is essentially a basic four function
calculator with square root, that added ROM-based "programs" using the
besic functions of the machine to carry out the scientific functions.
Some of the functions are very slow as a resylt. You can learn more by
My exhibit on the Casio fx-1 at
The Old Calculator Museum
> -----Original Message-----
> From: cctalk-bounces at classiccmp.org
> [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Jason T
> Sent: Sunday, July 29, 2007 9:34 PM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Name that calc
> I was reviewing my small calculator collection tonight and
> unboxed this old thing:
> I've had it for at least ten years and had nearly forgotten about it.
> It's a Dietzgen with Nixies, it's got "scientific" functions,
> and takes a standard power cord. That's about the extent of
> my knowledge.
> Anyone know the model number on it, or other interesting details?
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