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Title: Two "Portia" baby spring balances, 16lb., made in England, 1 [Go to resource]
Description: Two "Portia" baby spring balances, 16lb., made in England, 1920-1950 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: baby weigher
spring balanceTemporal: 1920-1950 Source: Science Museum Creator: Portia (maker) Identifier: 1982-561/17 Go to resource More Like this...
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