Rolex movement rattle when shaken, why?

[deskdiver]

I noticed this rattle and clicking noise in my 3 month SubC. Went to the AD, played with another Sub and heard the same noise. Now I can only hear the rattle when holding the watches right next to my ear. The noise is most prevalent when the watch is in vertical position and shaken sideways with short rapid strokes.

So since this rattle is normal and ruling out bracelet pins (had mine completely removed) and worn/loose rotor axle (brand new ones in AD does the same), which part of the watch movement is making this noise?




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