CECIL E. HANSON COLLECTION
ANTIQUE SURVEYING INSTRUMENTS

FOREIGN TRANSITS AND THEODOLITES

Troughton & Simms - London, England, ca 1890*

Serial Number:
Type: Theodolite
Telescope Length:
Diameter of Horizontal Circle:
Needle Length:
Diameter of Vertical Arc:
Height:
Weight:
Box: 2 Boxes
Condition: Good
Found: October, 1968 - Christchurch, New Zealand
CEH Inventory# FT11

*CEH indicated that this instrument was made around 1890, but I haven't located information confirming this.

From: http://amhistory.si.edu/surveying/object.cfm?recordnumber=762274

"Julius Wanschaff established a precision instrument shop in Berlin in 1872 and made zenith telescopes for the international project to observe the wobble of the earth on its axis. The firm was inherited by Hermann Wanschaff in 1903, and absorbed into Askania AG in 1922."

"Hermann Wanschaff, Preis-Vernzeichnis über Wissenschaftliche Instrumente (Berlin, 1904/1905)."