MusEYEum Online Catalogue

The Chappell Datumset Instruction Manual
ARCHIVAL ITEMS
instructions
Pell Optical Co
Europe: United Kingdom, England, Essex, Woodford Bridge
1960s
paper
overall: 172 mm x 109 mm

Instruction sheet relating to the Chappell Datumset, outlining its use in taking frame measurements which are met in everyday practice. Small format printed in black and apricot on six sides, folded. Includes details of horizontal measurements, vertical measurements, edge scales, graphical block, segment diameter gauge, apical radius scale, temple width scale and angular scale. Illustrated by three diagrams.

1999.4174/3