Coin watches are highly coveted for their rarity and impressive craftsmanship. To reveal the dial, simply press the concealed button located within the reeded edge of the coin, a clever mechanism that adds an element of intrigue to the timepiece. The process of transforming coins into functional timepieces requires great skill and precision, as mentioned by various renowned watchmakers including Cartier, Patek Philippe, Piaget, Rolex and very rarely at Vacheron Constantin.