John Harrison, chronometer, H5.
I'm reading "Longitude", the saga of how to determine longitude. John Harrison toiled on this for decades. The photo and text above relate to the watch (H5, his 5th and final version.) he finished making in 1770.
A ten week trial, after which it had gained 4.5 seconds. 250 years ago. 😱
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Trev
Slightly eccentric, wicked sense of humour. Self confessed watch cheapskate, who tinkers with watches. Love motorbikes, to date, I've ridden about 250,000 miles, 113,000 of which are on my BMW 1150GS....
Hampshire, England, UK
Member since
Last active: 2 hrs ago
7.50” / 19.05 cm
Very nice
Caveat: To see if someone else could make the watch to the same level of timekeeping cost the board of Longitude £500, or about £114,000 today. 😱
Damn that's nice . . . feels like something Jules Verne would have used to travel back in time.
Excellent book. I pulled my copy out of a pile someone was going to discard.
That last sentence..🤯🤯
Incredible 👏🏻👏🏻👏🏻👍🏻👍🏻
He started out making pendulum clocks, made from wood😱
Just ordered a copy of the book last week. It’s on my list of to reads. Looking forward to “Longitude”.