I have a PAM 663 that I purchased new from an AD less than a month ago. I first notice a slightly high pitched soft noise, almost like a rotor wobble, when moving the watch up and down (rather than side to side parallel to the ground). The p3000 movement is manual so no rotor. I thought it might have been the tubes and screws but after taking the strap and screws off the watch- the noise is still there. I don't see anything loose through the caseback. Seems strange to me- any cause for concern? Thanks!