This unusual solid brass surveying compass has a viewing sight in the cover. When the cover and arm are upright, look through the round sight in the cover and line up the compass with the string in the arm.There is a locking mechanism on one side to lock the compass when not in use.Compass Diameter 6cm & 2cm thick
This unusual solid brass surveying compass has a viewing sight in the cover. When the cover and arm are upright, look through the round sight in the cover and line up the compass with the string in the arm.
There is a locking mechanism on one side to lock the compass when not in use.
Compass Diameter 6cm & 2cm thick
The Project Gutenberg eBook of Encyclopædia Britannica, Volume XVI Slice VI - Lightfoot, Joseph to Liquidation.
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