VTG I Rare 4-Leaf Clover Shaped Surfer Charm

Here is a sterling silver charm/pendant/amulet, shaped like a 4-leaf clover, with a surfer riding a wave on his surfboard. It appears to be by Carl-Art. Sterling stamp is visible on back, shown close-up in photo 3. Photo 4 shows Carl-Art hallmark "CA" w/arrow through it on the inside, bottom of jump ring. Photos 5-8 show approximate size/meaurements. There is also a stamp of some kind on the front bottom of charm, shown in last 2 photos that looks like a geometric shape, "L", or "M"? Some wear.