A rare silvered and gilt brass Regiomontanus sundial and perpetual calendar, probably German, circa 1700,
the silvered brass plate mounted with pinhole sights and three section gilt brachialis supporting plumb line and bead, upper and lower 12-12 hour scales, calendar scale, shadow square and altitude quadrant, the reverse with perpetual calendar and two gilt brass volvelles with scrolling foliate decoration,
4in x 2 2/3in x 1/10in (10 1/2cm x 6 4/5cm x 1/4cm)
Footnotes:
Provenance:
The Time Museum, Inventory no. 1544.
UTO Auctionem, 13th November 1873, Zurich
Sotheby's Olympia, London, 30th October 2002.
Private collection.

Plumb line and bob replaced, silvering to sun dial side rubbed in sections. Perpetual dial was re-silvered in 1980 according to notes made by collector.