9ct gold ladies wristwatch, open face, circa 1910-1920 by: Yvonne
Hi Sarah, thanks for reaching out! So glad you found us!
Your photo shows a classic 1910s Swiss movement in a 9ct British case. Check inside the back cover for .375 + crown + date letter + G.S. That G.S. is likely George Stockwell, a London case maker. The 'inverted omega' you mentioned is the Swiss import mark."
