mini small Wild Heerbrugg T0

Description

Wild Heerbrugg T0
its very small
WILD HEERBRUGG T0
Small boussole theodolite by Wild Heerbrugg
This is the smallest 'regular' theodolite from Wild Heerbrugg. It has a magnetic compass allowing it to be used as both a regular theodolite as well as a Boussole. The microscope is only used for the vertical scale whereas the horizontal is read using a separate eyepiece which can be swapped to either side of the instrument using a prism. The horizontal scale is read using a micrometer bringing both ends of the scale into coincidence. This allows reading to 20" and esimating to around 10". That is about as good as the Keuffel and Esser transit at about half the size.
Offer welcome