MK-6358

[DeltaYankee]

Hi folks. My sister asked me to replace the battery of her MK-6358. However, the case back isn't the typical snap off, screw down, nor screw held. I've tried twisting the rose gold screw however the case back does not open. What's the method of removal for the MK-6358?

 

[jdm]

1 hour ago, DeltaYankee said:

I've tried twisting the rose gold screw however the case back does not open. 

That is called battery hatch, it has a bayonet lock not a screw. Turn it counter clockwise 90 deg or so to open it. If it doesn't  turn that way  turn it clockwise and back, pry gently to release the gasket sticking.

[HectorLooi]

It's so strange to have a see through caseback on a quartz watch. There is exciting to see inside!