Problem removing watch back

[Pete-mojsh]

I have needed to change the batteries on my watches so got a kit from Amazon, the first two were fine as they had the notches, the last one just has the smallest lip and I can't manage to get anything in there to lift the back.



Has anyone got any pointers on what else to try? So far a small flat head screwdriver and the little knife thing haven't been able to get anywhere near lifting it. It's a Hugo Boss watch.

[Pete-mojsh]

That might do it, I have the other knife type but it doesn't get anywhere near enough.