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Signature	Maker	Instruments	Comments	Location	References
MUSSCHENBROEK, SAMUEL VAN	Holland, 1639-81, OIM PHIM	Air Pump, 1675 = LEY.	older brother of Johan Joosten van Musschenbroek; his master mark was a lamp with crossed keys; the keys represent the city of Leiden.	Leiden.	Rooseboom 1; Crommelin 1; Daumas 1; G.L'E. Turner 24; USNM.
MUSSCHENBROEK, SAMUEL VAN	Holland, 1639-81, OIM PHIM	Air Pump, 1675 = LEY.	older brother of Johan Joosten van Musschenbroek; his master mark was a lamp with crossed keys; the keys represent the city of Leiden.	Leiden.	Rooseboom 1; Crommelin 1; Daumas 1; G.L'E. Turner 24; USNM.

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