Yes, I'm serious. I have this very nice watch with 4 dials (3 sub dials below the main) that needed a new battery but EVERY article I found indicated that there should be 4 screws to remove or that I just "pop off the back" with a screw driver or knife and 99% were covered by the former.
There were no screws on my backing and NO popping it off either. I thought perhaps it would unscrew, but it was virtually impossible to get a grip to even try so I disregarded that idea. After what seemed like an eternity of googling for a solution (first by just trying to identify my exact watch, which turned out to be a waste of time because Timex has created exactly 1,723,962 variations of the Ironman), I grabbed a few pair of needle nose pliers and tried a few ways to unscrew the cover again. Once I found a pair that had a really good grip (I could squeeze hard and they didn't pop off), I got a good grip of the watch and rotated the cover counter-clockwise (from the rear view) and sure enough, it began opening!
I will add photos soon but it's late and my "easy" camera isn't handy so that will have to wait. I sincerely hope someone finds this completely obscure information useful because I only have 2 hours of sleep available now thanks to this watch and my persistence. :)