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

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

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