Vintage The Polygraph Co. Brass Drafting Design Template

Polygraph combined drawing template and protractor

Victorian architect tool

4 5/8" DIAMETER

PAT. DEC. 8, 1885

Also stamped “IMPROVEMENTS PAT’D IN EUROOPE DEC-1886

Vintage Drafting Engineer, Architect Brass Tool, Philadelphia, PA 

This antique Victorian Polygraph Co. drafting and architect tool is a stunning piece of craftsmanship

Contains degree and angle number markings and pin hole markings across the center to create geometric shapes

The polygraph seems to have very little use

Most were brass, but this seems plated, but not iron/steel

The intricate design and attention to detail make this tool a unique addition to any collection

 Measurements easy to read

CONDITION
Fine

No issues noted

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Please contact us with any questions!