The form of Latin S occurs from Greek Σ by dropping a single out of the 4 strokes of that letter. The (angular) S-condition made up of a few strokes existed to be a variant from the four-stroke letter Σ currently while in the epigraphy of Western Greek alphabets, as https://emilianoxrhwr.digitollblog.com/31100887/how-much-you-need-to-expect-you-ll-pay-for-a-good-bud-naked-kits