Ruler
1949
Thornton Ruler
1920-1930
Ruler
1939
Box of "engine divided" rulers
Dancer Ruler
1860-1870
Thornton 12-Inch Rule
1960-1965
Ruler
1955-1965
Ruler
1917
Ruler, wooden, marked 'Armstrong'
Ruler
1875
Steel Rule
1900
Ruler
1860-1880
Halden Ruler
1870-1900
Gardner diesel engines Branded ruler
circa 1954-97
Folding rule
1885-1895
Gardner diesel engines Branded ruler
circa 1954-97
Ruler
1870-1900
Twelve-Inch Ruler
1930-1940
Sectional ruler
1900-1910
Ophthalmic Rule
1935-1945
Twelve inch ruler
1872
Wood and brass ruler, London Brighton and South Coast Railway
Gardner diesel engines Branded ruler
circa 1954-97
Gardner diesel engines Branded ruler
circa 1954-97
Ruler, plastic
German hexagonal section measuring rod, one of four
1715
German hexagonal section measuring rod, one of four
1695-1715
'Days to check 2000' ruler marketing 'Check 2000' tool
1999
German hexagonal section measuring rod, one of four
1695-1715
Ruler, used by Beyer
1930
German hexagonal section measuring rod, one of four
1695-1715
Ruler from Phase 3 Novavax 2019nCoV-302 Vaccine Trial
2020
A.G. Thornton Folding Ruler
1890-1910
Swedish measuring ruler, 28 5/8" long
Swedish measuring ruler, 26 7/8" long
Ebony ruler, Great Western Railway
1833-1858
Ruler, Great Northern Railway
1857