Signedin raised white print on each template: NESTLER
in black ink oncardboard: NESTLER
Inscribedsize indicator numbers engraved in the upper left-hand corners of certain templates: 608:76; 508:66; 606; 506; 605:56; 505:47; 604v:66; 504v; 603; 503:46; 5602 1/2:37; 5502 1/2:67; 5602:57; 5502:57
size indicator numbers in black ink underneath maker name on the guide cases: 503; 504; 505; 506; 508; 603; 604; 605; 606; 608; 5502; 5602; 5602 1/2; 5602 1/3
FunctionThis set was used for the construction of graphs and charts. Lettering guides can in general be used for inscribing various objects. Users trace the stenciled symbols onto the surface below using the appropriately sized pen held by the pen holder.
Historical AttributesUsed by Professor Owen Gingrich, Historian of Astronomy, in producing graphs and charts for his papers, before he got a computer to perform the function.
ProvenanceFrom Professor Owen Gingerich, Harvard University.