Last four photos are not the one for sale its just to show the result on timegrapher / vibrograph tester and the way it dismantled serviced. Newly serviced overhauled and works time accuracy of -/+12 seconds per day and reset to zero tested.
Video available by request how it works perfectly reset to zero.
Standard rate usually is -/+25 spd.
Please see photos for more description and result on timegrapher / vibrograph tester. Thanks
Dial/Face down -- +10 second per day accuracy
Dial/Face up ------ -2 seconds accuracy - usual normal wear position
Crown down ------ -12 second per day accuracy - usual normal wear position