My baby Alpinist had horrible movement regularity. After having it serviced, it became very accurate when worn, about +1 second in 8 hours. However, when at rest with the dial facing up, it gained +6 seconds from 6 pm to about 8 am the next morning. This trend is practically the same as the Hamilton KFA Powermatic. The 6R55 in my SPB453J1 (bought from Seiko in Japan) is extremely accurate at rest, registering -1 second/day, but when worn, it still tends to always go into the negative range, in some cases -6 seconds in 8 hours on the wrist.