Trainmaster Celsius Watch / BALL

This is a watch honouring Anders Celsius, the inventor of the modern temperature measurement scale. Though, this is not the first time BALL has incorporated a mechanical thermometer into one of its watches — the mechanical thermometer module can also be found on BALL’s Engineer Master Diver II TMT watch. The mechanical thermometer module (TMT) was developed and patented by BALL, and is able to measure the outside temperature between -35°C and 45°C with an accuracy of 97%; the thermometer readings are given in the half-moon shaped window at six o’clock on the dial. As a final homage to the inventor of the modern temperature scale, the caseback bears the portrait of Anders Celsius — via Perpetuelle.com Watch Blog