Watchcase having a thin appearance when being worn

A watch case comprising a case band, a crystal and a back detachably mounted on the case band and a caging ring for positioning a movement of the watch in the case, characterized in that:

• the case band has an upper opening sealed by the crystal and a smaller-sized lower opening defined by a projection of said case band radially extending inwardly at the lower part of case band,
• the caging ring has an upper portion and a lower portion containing outer surfaces, the outer surfaces of said upper and lower portions of said caging ring fitting within the upper and lower openings, respectively, of the case band, the ring being insertable in said case band through its upper opening before the mounting of the crystal and being fit into the lower opening of the case band;
• and
• the back is held against the lower surface of the projection of the case band by means of set screws, said set screws being tightened to lock the caging ring in the case, wherein the watch case presents a thinner appearance than it has by providing said smaller lower opening of said case band and said caging ring to enable the edge of the back and said set screws to be moved inwardly so as to be hidden when worn on a wrist.