Lady hamilton watch

I am trying to find out about this watch it was my grandmothers. On the face it has lady hamilton and the H symbol. On the back it has 14ct gold and L&W hamilton. The clasp on the band has- speidal usa del.-b20xgf-mesh & tops- 1/5040krgpfnds&crt. It has three diamonds on each side of face. It was really hard to take pictures so I hope someone can help. Thank you.