Lot's of great content in this thread!
FWIW, my Milspec averages about -2/+1 per day with the 1151 movement depending on how it rests overnight and whether I wear it that day. When it sits flat (dial up) it's about +1 and when its crown up or down it's about -2. Needless to say, I'm impressed with my Blancpain's performance.
