Pocket case of silver mathematical instruments
1728-1733
Rectangular protractor and plotting scale
1825-1830
One of three 12 inch scales of equal parts by Elliott
One of three 12 inch scales of equal parts by Elliott
Cased set of varnished card drawing scales by Holtzapffel & Co.
1839-1900
Boxwood scale
1800-1860
Brass scale and protractor by Pistor and Martins
1860-1900
Three foot scale
Ivory plotting scale of type known as single scale
Proportional plotting scale with cursor
Lockie's Improved Drawing Scales
Plotting scale
1851-1900
Three 12 inch scales of equal parts by Elliott
Set of six boxwood drawing scales with offsets
Ivory plotting scale opens to rolling parallel rule and contains dividers and combined pen and pencil
Three sets of cardboard drawing scales
20th century
Selection of 26 plotting scales
1876
Two line-dividing boxwood scales 6 inches and 24 inches
1870-1885