Own my Senator Perpetual Calendar (Cal 100) for about 3 weeks now and the watch had been gaining approx'ly 20 sec/day out of the box despite my trying of different resting postions, placing it on my Orbita or Underwood winders and wearing. By far, this is the worst results I have seen from my small GO collections.
Gave up and just sent it back to the AD for regulation. May take up to a month to get the watch back as my AD claimed that most of the local watchmakers had gone to Basel. Will update you on the matter once I get my watch back.