Three buttons.

Two have a twisted rope edge. On a circle with a lined background is an oval with a smooth background and a twisted rope around the outer edge of the oval. On the oval is an anchor with a snake twisted around it, the head poking left through the ring/shackle. The head is poking left through the ring/shackle at the top. Its body goes under the right-hand stock, over the shank to the left then under the shank to the right, over the right arm and curls under the crown. Surgeon

One has a twisted rope edge. Within a circle with a lined background is an anchor with snake twisted around it, the head lying toward the right along the stock. Its body goes under the left-hand stock, then over the shank to the right, then under the shank to the left and under the left arm. Surgeon.