Thought I'd share some pictures of my Invicta cockpit watch. I was given this by my father earlier this year and my investigations lead me to believe it is 100 years old this year. (and still keeping time to 20s a day!).
I still haven't been able to reliably track down what the "Sth 1864" inscription on the back might mean so if anybody has any ideas please feel free to add them.
It would have been assigned to a plane in the Royal Flying Corps or Royal Naval Air Service. I have looked into plane model numbers and while there is a Sopwith Camel (RFC) which had the serial 1864, it didn't have the Sth part.
(also is there a way to limit the size of the images?)