Opening a watch

[john10001]

Is there a special tool I need to open a watch up or anything you'd recommend to do it? I need to regulate my SB3 as its a little fast at the moment.

The back of the watch does it screw on and would I need to twist anti-clockwise to get it off?

[speedish]

If screw on back, then a back opener, adjustable clamp. Also you will need a case holder if the back is on tight.

If pressed on back then case back opener. Blunt knife. Then a press to push fit the back.
If you havent done this before, dont attempt this.

ish

[mat]

The SB3 is screw on, but I'd try with a ball of tape first with the sticky side outwards. It's very easy to mark case backs with tools.

[Stuart]

If you havent done this before, dont attempt this.

got to be a first time!
try a massive lump of bluetack on the back whilst holding the case in your other hand and unscrewing - worked for me - mark with tippex a point where the back meets the case before you open it and this enables you to know how far to tighten it when replacing it

[Reeny]

Type "watch tools" into the Amazon search bar.

You need a steady hand, and;
1x Case back opener
1x very small flat blade screwdriver (from a good quality set)
And a magnifer lens of some sort.

One mark + or - tends to move the timing by 6 seconds on most of the ETA movements.
There was a link to ETA regulation on here somewhere.
Good luck.