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1826-1891, surveying instrument maker, German

Fennel, Otto

1826 - 1891
active 1852-1912, optical, surveying and mathematical instrument makers, English

J H Steward

1852 - 1912
active 1954-1986, surveying instrument maker, Heerbrugg, Switzerland

Wild Heerbrugg A.G.

active 1912-1970, optical, surveying & mathematical instrument makers, English

J H Steward Limited

active 1870s-1900s, mining equipment, surveying & scientific instrument maker, Derby, England

John Davis and Son

active 1920s-1954, surveying instrument maker, Heerbrugg, Switzerland

Wild Heerbrugg

active 1870s, surveying instrument maker, Stuttgart, Germany

Zimmer Brothers

active 1859, patentee & maker (?) of surveying instruments, American

Drummond, J M

active 1890s-1920s (?), surveying instrument maker, Crayford, London, England

Heath and Company Limited

active 1828, meteorological & surveying instrument maker, London, England

Caprani, P

active 1900s-1940s(?), mathematical & surveying instrument maker, London, England

Cary and Porter Limited

active 1910-1968, surveying instrument maker, Kassel, Germany

Otto Fennel Söhne

active 1830s-1850s, mathematical & surveying instrument maker, Paris, France

Susse frères

active 1850s-1900s, surveying instrument maker, Cologne, England

Mauch, D.

active 1882-1911, surveying instrument maker, Bad Liebenwerda, Germany

R. Reiss

active, 1850s-1900s, surveying instrument maker, Altonia, Hamburg, Germany

Dennert and Pape

active 1885-1988, surveying & drawing instrument manufacturer, Aarau, Switzerland

Kern and Company AG

1800-1899, surveying instrument maker, Dijon, France

Chairgrasse