⌚The Greats

H4, a 1.4-kilogram watch thirteen centimetres across, sailed to Jamaica aboard HMS Deptford in 1761 and lost about five seconds in 81 days — accuracy so far beyond belief that the Board of Longitude demanded repeat trials, disclosure of the mechanism and copies by rival makers before paying. Harrison received his final award only in 1773, aged 80, after King George III took up his case, reportedly declaring, 'By God, Harrison, I will see you righted.'

Daniels spent the better part of two decades trying to convince the Swiss industry to adopt his co-axial escapement, which nearly eliminates the sliding friction — and therefore the oil dependency — of the lever. He fitted demonstration versions into other makers' movements and was politely refused across Switzerland, until Nicolas Hayek's Omega finally industrialized it in the 1999 De Ville Co-Axial. Omega has built its mechanical range on co-axial calibers ever since — vindication delivered when Daniels was 73.

Dufour built grande sonnerie pocket-watch movements for Audemars Piguet in the 1980s, anonymously, before deciding his work would carry his own name. The market eventually agreed with him about what that name was worth: in November 2020 at Phillips in Geneva, the twentieth-anniversary Simplicity numbered 00/20 sold for about CHF 1.36 million — more than thirty times what the model cost when he launched it, for a watch with no complication at all, valued purely for its finishing.

When the Great Kantō earthquake and fires of September 1923 destroyed the Seikosha factory, roughly 1,500 customers' watches left in for repair burned with it. Hattori announced he would replace every single one with a new watch — an enormous voluntary liability for a company that had just lost its plant. The gesture became a foundation of the firm's reputation in Japan, and the following year, 1924, the first watches bearing the name Seiko went on sale.

Waltham's inexpensive, robust 'Wm. Ellery' model — around thirteen dollars in the early 1860s — became the Union soldier's watch of the American Civil War, selling in the tens of thousands; Abraham Lincoln owned one. Dennison himself profited little: forced out of the struggling company he had founded, he eventually settled in Birmingham, England, where the watch-case works bearing his name outlived him by decades. The Swiss delegation that studied Waltham's machines at the 1876 Philadelphia exhibition went home and rebuilt their industry around his idea.

Through 1758 Lepaute worked alongside Alexis Clairaut and the young Jérôme Lalande on one of the century's great computations: how much Jupiter and Saturn would delay Halley's comet. Their forecast — perihelion in spring 1759, within about a month's margin — was vindicated when the comet arrived in mid-March. Clairaut omitted her from the credit; Lalande spent the rest of his life correcting the record, writing that hers was the era's most distinguished female scientific mind. A lunar crater now bears the Lepaute name.

Struthers' doctoral research took on an unglamorous corner of the trade's past: the eighteenth-century flood of 'Dutch forgeries' — cheap watches bearing fake London makers' signatures that damaged English watchmaking's reputation in its golden age. By examining surviving movements as physical evidence, she traced how and where the counterfeits were actually produced, showing the trade's history can be read from the objects themselves when the paper archives lie. The approach — watchmaker as forensic historian — was exactly what a bench-trained scholar could do and a pure archivist could not.