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Signature	Maker	Instruments	Comments	Location	References
DOBLER, J.M.	Germany, fl.1690-1730, OIM	Telescopes = Gel-TX895, DRE; Binocular Telescopes = DRE (1730), MOS (2).	"opticus fecit."	Berlin.	Chenekal 4; Drechsler 2; RSW.
DOBLER, J.M.	Germany, fl.1690-1730, OIM	Telescopes = Gel-TX895, DRE; Binocular Telescopes = DRE (1730), MOS (2).	"opticus fecit."	Berlin.	Chenekal 4; Drechsler 2; RSW.

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