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Signature	Maker	Instruments	Comments	Location	References
SONTHALMER, VALENTINUS	Germany,		an astrolabe is insribed "Valentinus Sonthalmer Georgio Weinmayster dono anno 1535"; it is also marked "H.G." (1) and "1537"; it was formerly in the Nachet Coll.; Zinner thought that Valentinus Sonthalmer was also known as Joh. Gebhart; Nachet thought it was the work of Georg Hartmann.		Zinner 1; Gunther 1; Price 1; ICA 2; Nachet; MADEX; Michel 2 and 3.
SONTHALMER, VALENTINUS	Germany,		an astrolabe is insribed "Valentinus Sonthalmer Georgio Weinmayster dono anno 1535"; it is also marked "H.G." (1) and "1537"; it was formerly in the Nachet Coll.; Zinner thought that Valentinus Sonthalmer was also known as Joh. Gebhart; Nachet thought it was the work of Georg Hartmann.		Zinner 1; Gunther 1; Price 1; ICA 2; Nachet; MADEX; Michel 2 and 3.

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