Marine Chronometer #2299 made by Charles Frodsham of London, circa 1844 – 1860. It was later modified to include a telegraph break circuit by William Bond and Son of Boston. From the <a href="https://en.wikipedia.org/wiki/Ladd_Observatory_collection" class="extiw" title="w:Ladd Observatory collection">Ladd Observatory collection</a>.
<a href="//commons.wikimedia.org/wiki/User:Ktr101" title="User:Ktr101">User:Ktr101</a>
<bdi><a href="https://en.wikipedia.org/wiki/en:Ladd_Observatory" class="extiw" title="w:en:Ladd Observatory"><span title="astronomical observatory at Brown University">Ladd Observatory</span></a>
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