Accession Number: 2004.134.62.19
Description: Black-and-white glossy; product photo of a plastic numberaid, an abacus invented by Andrew F. Schott; the photo is taken at an angle while the numberaid lays flat on a surface; the bottom of the product says "Numberaid" across it. On reverse: written in pencil BL "Numberaid 1-0347 obsolete."
Medium: Photographic Paper
Print Size: 8" (h) x 10" (w)
Date: ca. 1971
Photographer: Lin Caufield Photographers Inc.
History/Provenance: Photo was taken for the American Printing House for promotional purposes.
Credit Line: (see provenance)
Subjects: Instructional aids, tools, and supplies Mathematics Slates
