Trade card of US makers of the Bidston Observatory chronograph, c.1868 (given for telegraphic inventions at exhibition of Mass. Charitable Mechanics Assoc.).

Trade card of US makers of the Bidston Observatory chronograph, c.1868. | National Museums Liverpool

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https://www.liverpoolmuseums.org.uk/artifact/trade-card-of-us-makers-of-bidston-observatory-chronograph-c1868

Trade card of US makers of the Bidston Observatory chronograph, c.1868.

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http://content.liverpoolmuseums.org.uk/artifact/trade-card-of-us-makers-of-bidston-observatory-chronograph-c1868