Epact Scientific Instruments of Medieval and Renaissance Europe

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 Hans Troschel
Hans Troschel (or Droschel) was born in 1548 or 1549, probably in Bamberg. He settled in Nuremberg and became a citizen in 1579.

Surviving instruments by him include ivory diptych sundials, lunar volvelles and astronomical compendia. His instruments are usually marked with a thrush on a twig. Hans Troschel died in Nuremberg on 1 June 1612.

For instruments by Hans Troschel, see:
   Diptych Dial, Signed by Hans Troschel, Nuremberg, circa 1600 (Oxford, MHS)
   Diptych Dial, Signed by Hans Troschel, Nuremberg, Dated 1584 (Oxford, MHS)
   Diptych Dial, Signed by Hans Troschel, Nuremberg, Dated 1586 (Oxford, MHS)
   Diptych Dial, Signed by Hans Troschel, Nuremberg, Dated 1618 (Oxford, MHS)
   Diptych Dial, Signed by Hans Troschel, Nuremberg, circa 1600 (Oxford, MHS)
   Diptych Dial, Signed by Hans Troschel, Nuremberg, Dated 1582 (Oxford, MHS)
   Diptych Dial, Signed by Hans Troschel, Nuremberg, Dated 1580 (Oxford, MHS)
   Diptych Dial, Signed by Hans Troschel, Nuremberg, circa 1600 (Oxford, MHS)
   Diptych Dial, Signed by Hans Troschel, Nuremberg, Early 17th century (Firenze, IMSS)

References:

E. Zinner, Deutsche und Niederl?ndische astronomische Instrumente des 11. bis 18. Jahrhunderts (2nd ed., Munich, 1967), pp. 551-5, and p. 687; C. Vincent and B. Chandler, "Night-time and Easter Time: The Rotations of the Sun, the Moon, and the Little Bear in Renaissance Time Reckoning", Metropolitan Museum of Art Bulletin, 2 (1969), pp. 372-84; P. Gouk, The Ivory Sundials of Nuremberg 1500-1700 (Cambridge, 1988), pp. 59-60, 117; S. A. Lloyd, Ivory Diptych Sundials 1570-1750 (Cambridge, Mass., 1992), p. 57.