Rolex 3135 rate variation with temperature

[steve1811uk]

Hi, I just finished the service of a Rolex 3135. Amplitude is great, 295 degrees horizontal after 2 hours and 280 after 12 hours. Vertical positions are 25 degrees down on those. I am however seeing a rate variation with temperature. I have 0 SPD on wrist, say 38 degrees and +7 SPD at 18 degrees room temperature. That equates to +0.35 SPD which is within spec I believe (+-0.5 SPD/ Deg C max). It just seems more than I would expect from such a high quality movement. To put that in context, I see similar rate variation with temperature for a Seiko 7S26. Just wondering what you guys see. Thanks, Steve.

[steve1811uk]

Looked into this some more and I believe that some of the increase in rate is attributable to the drop in amplitude after 12 hours off wrist, from 300 to 275 degrees horizontal and some is due to the lower temperature (38 to 18 degrees). I can see that approx 3 to 4 seconds a day is attributable to each. I can be happy with that.