My Speedmaster Co-Axial goes ahead by 1min in 1 weeks of time ... its not giving accurate time.. can anyone suggest plz
That's 8 or 9 seconds a day, which isn't terrible but it's definitely bad. I'm getting +1.4s/day on a recent Coax (9300). You should consider taking it for adjustment (or full service if it is old enough).
I suggest you take it to be regulated, if it was mine I would. Chronometer average is between -4 to +6 seconds per day. My Speedy Pro, which is not Chronometer, runs between +6 to +9 spd. It runs at +6 spd only when I'm physically active during the day, like when I'm at the company's site, but when I work in the office the whole week, it runs up to +9 spd. BTW, I sync my watch every Monday morning.
Thread number 2 on this in 2 days and a third amount of time difference. Take it to where you purchased it or the nearest Omega Boutique and get it time regulated.
Where are you located? Can you take it to an Omega Boutique or Service Centre? If yes, it should be able to be inspected and regulated at no charge. If you can't do that, try to place the watch in a different position overnight, e.g. face down on a soft cloth for a week. If this does not change the rate, try face up for a week. It may take some time to find out what orientation works. It was a method stated by Rolex some years ago, but with modern movements the changes in resting position will only be minimal so it will take some experimenting.