Tissot T121.420.47.051.04
Tissot, model: T121.420.47.051.04, dial diameter: 47.5, Functions: Altimeter (can be measured in feet and meters), altitude difference meter, stopwatch (split and cumulative time), compass, dual alarm clock, thermometer (can be measured in Fahrenheit and Celsius), barometer, date and time (available in 12 hours or 24 hours), perpetual calendar, countdown, complete set.