Daytona Stop Watch Function

[PhilK]

Hi All - Just purchased a new 116520 SS Black Dial Daytona from my local AD. Am thrilled to say the least!! A quick question though for other Daytona owners. When running the stop watch function, I notice that the timer hand occasionally jumps a bit when moving between seconds (ie rather than a smooth(ish) movement between each second (around 8 beats) it may occasionally jump by around 3/10 of a second (normally around the 7-9pm position on the dial). It is not losing time on the stop watch (ie a timed minute is identical to the movement of the small second hand) Is this movement usual? Is it just down to the new mechanism settling in? Is it anything to worry about? Views of others welcome.