UNSIGNED
细节
A late 19th Century 19cm. radius vernier octant
unsigned
In oxcidised brass, the arc with inlaid silvered scale divided 5- 0- 120, vernier (lacks clamp) with swivel magnifier, telescope, twin mirrors and seven shades, mahogany handle and two pin feet with keystone box (later)
30.5cm. long
unsigned
In oxcidised brass, the arc with inlaid silvered scale divided 5- 0- 120, vernier (lacks clamp) with swivel magnifier, telescope, twin mirrors and seven shades, mahogany handle and two pin feet with keystone box (later)
30.5cm. long