Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Long and Long Scale Slide Rules
Unknown / SOHO second
50 cm
Basic Calculations

Notes: An instrument maker hand scribing the scales and tick marks realised a crucial mistake had been made and hence there was no point in completing the layout. The mystery is why this second did not get destroyed.

Image 1

Image 2