Step 2: Gut It!
Once you get the back off, carefully pull out the watch pins on the side and lift the whole time mechanism out of the watch body. Set aside for later disassembling.
My watch had a plastic band on the inside marking the 12, 3, 6, and 9 spots. I grabbed it with pliers, bent it back and forth a bit to loosen it up, and yanked it right out.
Now you have a beautiful, wearable picture frame ready to be filled!