Thank you!
Some more information I have found..:
The inside casing is also marked J. BOSS 14K with a scale and a crown on top.
serial is 6324139.
By looking up the watch serial number, it seems like it is a grade 983, size 0, dated 1909/1910. Predecessor of Hamilton's men first wristwatch?
Would love to know more..
Thank you,
Mati