vintage and contemporary postcards and stamps from around the world


15 November 2020

Timekeeper

This is John Harrison's 1759 chronometer, a clock which calculated longitude while at sea. It took him over 30 years of trial and error to perfect the technology. The watch itself is 13cm in diameter and you can see it for yourself at the Royal Observatory Greenwich.
 
for Sunday Stamps - your choice

3 comments:

Mail Adventures said...

A very intricate design, both for the device and the stamp!

My stamps are also British.

Joy said...

Gorgeous stamp and a wonderful piece of science and craftsmanship.
My stamps also feature practical objects here

viridian said...

My contribution is here:
http://viridianpostcard.blogspot.com/2020/11/sunday-stamps-free-choice.html