A sapphire and wooden timepiece with a peculiar dial design. 3, 5 & 7 are the only visible numbers. There is a philosophical reason why the Compasses are placed on the high-twelve position above and it is reflected by the Square on the 6 o'clock position below. A mathematical curiosity is behind the reason why the Level is placed on the 9 o'clock hour. There is a Trowel, six in total, for each hour not occupied by a number or symbol.