File:Triangle Celluloid Protractors c. 1903.jpg

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Description	English: Triangle protractors (combining protractor and set square) made of transparent celluloid; Wm. E. Stieren Co. catalogue, c. 1903. Deutsch: Dreieckswinkelmesser (eine frühe Form des Geodreiecks bzw. Kursdreiecks) aus transparentem Zelluloid im Katalog der Wm. E. Stieren Co., ca. 1903.
Date	circa 1903 date QS:P,+1903-00-00T00:00:00Z/9,P1480,Q5727902
Source	Catalogue [of] the Wm. E. Stieren Co. Pittsburg, p. 202. via: hathitrust.org
Author	Unknown authorUnknown author

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	20:00, 18 March 2020		1,527 × 1,060 (247 KB)	Torana (talk \| contribs)	{{Information \|description={{en\|Triangle protractors (combining en:protractor and en:set square) made of transparent en:celluloid; ''Wm. E. Stieren Co.'' catalogue, c. 1903.}} {{de\|Dreiecksde:winkelmesser (eine frühe Form des de:Geodreiecks bzw. de:Kursdreiecks) aus transparentem de:Zelluloid im Katalog der ''Wm. E. Stieren Co.'', ca. 1903.}} \|date={{other date\|c\|1903}} \|source=''Catalogue [of] the Wm. E. Stiere...

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