Wild Heerbrugg T0
Wild Heerbrugg T0 archetype boussole from Wild
This one came up for sale and I couldn't resist. It is a very early Wild (it is the second oldest in my collection, after the T2 archetype). I bought it for its age as common wisdom (Bennett, Virtual Archive) has it that there are only two types of this instrument. However, upon arrival a number of differences were soon clear. First of all the telescope is smaller and without a sight. Also the knobs for tuning the vertical circle are the other way around. The compass is somewhat smaller, the compass reading mounts are different and the micrometer screw of a different design. Finally (of the differences I have spotted so far, the illumination window for the vertical circle is of a different design.
This one has had a rough life; the lid closing the tripod mount seems missing and one of the milk glasses over the compass card has been replaced with a clear piece of plasting... Otherwise the instrument seems fine and in working condition.
Wild T0 old
Data sheet
- Year
- 1940
- Serialnumber
- 6529
- Type of use
- Survey
- graduation
- deg
- measuring range
- HZ: 360° | V: ±55°
- diameter scale in mm
- Hz: ca 80 | V: ca 50
- accuracy
- HZ: 1' | V: 10'
- fine reading
- drum micrometer
- image direction
- inverted
- magnification
- 16
- field of view @1000m in m
- 49
- Size instrument (Ø x h) in m
- 0.14 x 0.22
- weight instrument in kg
- 2.8
- Size case (Ø x h) in m
- 0.14 x 0.24
- weight case & in kg
- 0.6
- country obtained from
- Netherlands
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Wild Heerbrugg T0 archetype boussole from Wild