Horary quadrant with Gunter projection

This is a horary quadrant marked with Gunter scales and a surveyor's shadow square in the top third. The brass sights on the left edge are intact but the plumb and bob are missing. As is common with boxwood quadrants, the reverse has no nocturnal dial and has therefore not been photographed.
Fitted with sights brass and plumb bob.
5 stars marked and named:
Wing of Pegasus, Arcturus, Lions Heart, Bull's eye, Vulture's heart.
Table of R.As of these stars.
Geometrical square in apex.
Latitud 51 30'.

Object Details

ID: NAV1037
Collection: Astronomical and navigational instruments
Type: Horary quadrant with Gunter projection
Display location: Not on display
Creator: Unknown
Date made: circa 1675
Credit: National Maritime Museum, Greenwich, London, Caird Collection
Measurements: Overall: 12 x 124 x 140 mm