Octagonal. Hour scale for 51°32' [London] in Roman numerals; scales for 48°, 53°, and 56° in Arabic. Unusual scale order--48°00', 51°32', 56°, and 53°. On bottom of compass box is a rose. Compass rose with English initials. Blued needle, type 21. Nut at base of gnomon is also brass.
