TASCO / USA (1950)
( ? by RELIABLE TYPEWRITER & ADDING MACHINE CO., Chicago, Ill. / USA )

A   N A I L   is used to operate the calculator
For  S U B T R A C T I O N  the  S L I D E R  has to be  MOVED UP.

This calculator-type was invented & patented 1911 by CHRISTEL HAMANN,
named  » T R I C K «  and  made by  MERCEDES, Zella-Mehlis / Germany

    B o d y   S i z e   ( W * D * H )   =   77 mm * 137 mm * 5 mm

Have a Look at the HISTORY

impressum:
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© C.HAMANN         http://public.BHT-Berlin.de/hamann         12/24/07