The charms are in the style of mid-20th century charms (heart locket possibly younger). 2 look to be carved carnelian (or even Bakelite/cherry amber). One of the charms looks added later, it could be an antique locket or a later reproduction.
Someone may have thought one of the charms depicted the god Hermes but it's not the brand's style, not even from the era.
If you find a loop or strong magnify glass, you will learn more by examining the gold hallmarks on each charm. You should be able to see the year, the gold content, where is was assayed and the maker's mark.