Round base with silvered compass, and pillar which supports a latitude arc and a pivoting equatorial hour scale. The latter is in the form of an incomplete armillary sphere, consisting of 2 c-curves at right angles. Needle type 11, jewelled pivot; needle brake.
Materiaal
"MADE BY / EASTERN SCIENCE SUPPLY CO. / BOSTON. MASS. U. S. A." on bottom of base.
