The Sunwatch! 1920s pocket sundial
12:20
Pocket Sundial Retorts!
10:11
H.M. Kala Pocket Sundial - the weirdest time telling device in my collection
10:40
The Sector: the calculator of the 1500s
8:31
The Underground Clocks of Paris
43:09
This Pocket Watch is Still Shockingly Accurate Even After 111 Years
52:26
Restoration of a $100,000 Rolex GMT From 1958!
11:48
The compass no one knows how to use
7:20