18th century, Danish, brass with traces of gilding, signed 'Math. Jochimson', obverse engraved 'Tempora mutantur'. Mutant et tempora fate', Elev:poli 55. gr 40.m.s, outer volvelle giving days of the week against days of the month, inner volvelle giving phases of the moon against both the above, centre engraved with man-in-the-moon, reverse volvelle giving days in each month, zodiac sign, hours of day and night and sunrise and sunset, alidade with sight measures declination with rotating scale 0- 90 -0 on the edge of the instrument also giving hours of daylight against months of the year on the reverse side, engraved sun to centre 6.7cm diameter