Manual wind movement with 40 hour Power Reserve, Power Reserve indiacator between the 1 & 3 o"clock position, Seconds indicator at the 6 o"clock position, Retrograde Calendar indicator between the 8 & 12 o"clock position - the retrograde calendar automatically flips back to the begining of a month when it reaches the 31st (manual correction is required when a month is less than 31 days).