WWII Telescopic Alidade
Telescopic alidade made in 1941 by Hall Bros, Purley Way, Croydon, England, serial No. 41631. The instrument is marked with the British Government 'crow’s foot' and was probably supplied to the army. It would have been used on a plane table for mapping etc.
I have left it in original as found condition, only having cleaned where the makers mark is - so it should clean up well.
Approx measurements: 38cm wide x 7cm deep x20 cm high.
Price includes postage and insurance.