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Signature	Maker	Instruments	Comments	Location	References
T.D. 1	Germany, c.1600, MIM	Diptych Sundials, ivory = Drecker Coll. (1600) = DPW, ADL-T10, ADL-T11, ROM, HAK, OMM, WHI, Huelsmann Coll., Soth. 3/27/72 = TIM, FIN-84; Skaphe Sundial = OXF.	surely these are by Thomas Ducher 1, which see; master mark is a crowned serpent; the sundial at OMM has two compasses, marked "Wegweis Kampsus" and "Marinus Kampassius", it is in a leather case.	Nürnberg.	Zinner 1; Gouk 1; Price 2; Bryden 16; Syndram; ADL; RSW.
T.D. 1	Germany, c.1600, MIM	Diptych Sundials, ivory = Drecker Coll. (1600) = DPW, ADL-T10, ADL-T11, ROM, HAK, OMM, WHI, Huelsmann Coll., Soth. 3/27/72 = TIM, FIN-84; Skaphe Sundial = OXF.	surely these are by Thomas Ducher 1, which see; master mark is a crowned serpent; the sundial at OMM has two compasses, marked "Wegweis Kampsus" and "Marinus Kampassius", it is in a leather case.	Nürnberg.	Zinner 1; Gouk 1; Price 2; Bryden 16; Syndram; ADL; RSW.

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