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Title: Photometer model S511 by Weston [Go to resource]
Description: Photometer model S511 by Weston, complete with two range-multiplier caps and instructions, in leather case, ranges 500 lux, 2500 lux and 5000 lux License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1992-513 Go to resource More Like this...
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