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Got my quartz regulator (mechanical as well) yesterday and been having a dabble to day with it, some interesting results at the moment.
Checked a few 7As and all show readings of less than 0.20 sec a day variation, my 7548/7546/7549 have shown readings all over the place with one of them showing minus 2.15 seconds a day.
The best i checked was a ladies quartz (my wifes) which was showing minus 0.03 a day.
But imo regulators give you a good idea of whats going on but in real life results can make a bit of a lie of the figures but a great starting point.
I can see me having a lot of fun over the next few months with this bit of kit



Checked a few 7As and all show readings of less than 0.20 sec a day variation, my 7548/7546/7549 have shown readings all over the place with one of them showing minus 2.15 seconds a day.
The best i checked was a ladies quartz (my wifes) which was showing minus 0.03 a day.
But imo regulators give you a good idea of whats going on but in real life results can make a bit of a lie of the figures but a great starting point.
I can see me having a lot of fun over the next few months with this bit of kit


