STG I Zodiac I Charm I Pendant I Gemini I Twins

This is a sterling silver charm for a bracelet, or pendant for a necklace depicting the zodiac sign Gemini. It is a carved out charm, & reads "Gemini (Twins) 5.22 - 6.21" which are the birthdates under which Gemini would fall. The hallmark is shown "A.C. STER" which unfortunately, I could not identify. Shows minimal wear. Measures approx. 1" in diameter, & would dangle approx. 1.25", see photos 4-6 (wee bit larger than a quarter). *Please note that the chain in photos 7-8 is not included*