Archive of Collections



Details and Image



TypeModel No.MakerCountryConstruction
Material		DateScale LengthArea of Use
Disk
"15"" Circular Slide Rule"
"Perrygraf for HRB-Singer, Inc."USA
Cardstock
c. 1955Dia. = 16.6 cmGeneral Purpose

Notes: General purpose calculations including a coversion table on the reverse side


Image 1




Image 2