Trippensee and an Oland Sales Co. Planetarium, Saginaw, Michigan, and Olney, Illinois, Trippensee Planetarium Company, chain- and gear-driven Bakelite sun, Venus, earth, and moon on a movable arm marked with the maker's name as above and inset compass, molded circular base with seasonal, monthly, and zodiacal calendar; the Oland example with chain- and gear-driven brass sun, tin earth, and wood moon, cast iron base and arm, brass plaque reading in part: The Oland Sales Co. serial no. 1156A.
Trippensee and an Oland Sales Co. Planetarium, Saginaw, Michigan, and Olney, Illinois, Trippensee Planetarium Company, chain- and gear-driven Bakelite sun, Venus, earth, and moon on a movable arm marked with the maker's name as above and inset compass, molded circular base with seasonal, monthly, and zodiacal calendar; the Oland example with chain- and gear-driven brass sun, tin earth, and wood moon, cast iron base and arm, brass plaque reading in part: The Oland Sales Co. serial no. 1156A.
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
