Pilot chronograph with revolving calculator bezel to use as a time-speed-distance computer, to multiply, divide or calculate proportions. Converts miles into kilometers and vice-versa. Comes  with instruction of use manual. Stainless steel case, handwound 17 jewel Valjoux 7733 movement, black index dial Push buttons with start – stop –return to zero function and small subsidiary dials to register elapsed time in minutes and seconds.