Patek Philippe

I have been wearing my 5970p now for 20 days and am winding it every day at approximately the same time, per the instruction booklet.  My watch, thus far, is running 90 seconds+ fast over the last 20 days.  Is this acceptable or should I take it into Patek for adjustment?

Below the COSC Specs.

Best,

Nicolas

... as it is indeed plus or minus a couple of seconds. But if it is plus 90 seconds after 20 days, then it is 4.5 seconds per day. Not only is this at the top of the acceptable range, but also it appears to be a change in one direction only. Normally I would expect a couple of seconds plus on one day and a couple of seconds minus on another day...

The implication of plus 90 seconds after 20 days is that every two months you can readjust the time on your watch as it will be 5 minutes off.....

But I am not an expert on the topic.

Well, the new PP Seal specs specify that “For calibers with diameters of 20 mm or more, the rate accuracy must lie within the range of -3 and +2 seconds per 24 hours.”

The specifications mentioned before might be more doable for an automatic movement.

A manual can not keep the power as constant as the auto can do and hence it is "less" accurate.

Again: a very good accuracy !


Regards

Moritz

Is it generally accepted that for similarly regulated watches that manual wind versions are generally less accurate than automatics?  It makes intuitive sense that the mainspring would unwind with decreasing torque vs. an automatic that (when worn) would keep a relatively fixed level of wind.  Is there any intuition for the typical effect of this?  My personal tolerance level for my watches is a few seconds a day but anything at or above five seconds is a bit undesirable even if understandable.

I have always found the manual winding watches to be more accurate over the self winding, no matter what the brand. I think there are just less moving parts and the wind from the rotor is inconsistent at best given all the wrist positions and amount of motion in general whereas the manual wind watch gets the same charge each day.