Vintage Reverse Carved Poseidon Merman Glass Ring Aries Adjustable

Fun vintage reverse carved and painted glass ring depicting the god Poseidon or a merman, probably representing the zodiac sign Aries. Nicely done and looks like it was made in the 1970's. Adjustable size with a maximum size of about 7 as shown in photo. It's silver tone metal, unmarked, and in great vintage condition with no issues. The top measures 3/4" in diameter.