LOST men’s gold and ruby wedding ring - reward (los altos)

My dad lost his wedding ring after 35 years.
It was either somewhere in Los Altos, or somewhere in the hills of the peninsula where he was riding his bike.
It is a gold band with a single large ruby.
Engraving has both his initials JBM and my mom’s initials MJR.
Reward offered to anyone who finds it!