// todo need optimize like in event.jsp. Add indexing or not indexing this page. John Harrison Completes H1 (jan 1, 1730 – jan 1, 1735) (Timeline)
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John Harrison Completes H1 (jan 1, 1730 – jan 1, 1735)

Added to timeline:

NHD John Harrison

ByOwen Neely
30 Jan 2020

Date:

jan 1, 1730
jan 1, 1735
~ 5 years
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