1953 Wild Heerbrugg K2 Alidade
This instrument was given to me in 2004 by a former colleague. The instrument is of Swiss origin, made by Wild Heerbrugg, just as most of my theodolites and levels.
This instrument was used (and modern versions are still used) to terrain mapping in the field. The box is provided with leather straps so it can be used as a rucksack, while the tripod can be tied to it.
The tribrach that is in the box would be fitted on the tripod. On this tribrach a drawing board (dimensions according to the packing list: 61.5cm x 46cm, not in my possession) should be mounted. A sheet of paper could then be placed on this board and, on top of that, the alidade would have been placed.
The box itself is like a time-capsule. It was put in a corner after its last use, still containing all the drawing pins, pencils etc that would have been used in the field. The amount of original accessories is amazing.
In the case the following items can be found next to the alidade and its tribrach (see figure 4 and figure 5):
The telescope gives an inverted view and has stadia hairs with a 100 multiplication constant. The vertical circle is illuminated the same way as the circles of the 1929 Wild T2. The circle itself is centesimally divided and can be read directly down to 0.1 gon and estimated one decimal further.
If you have any questions and/or remarks please let me know.
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1953 Wild K2 Alidade 19th c. measuring rod 19th c. Lerebours chain 20th c. Ahrend chain 20th c. Chesterman chain 20th c. Tibaut steel tape 20th c. Ahrend steel tape 20th c. Ahrend steel tape 1980s DOSbouw clinometer