the back of the watch it gives you a hint on how to use the top of the watch. The first direction is musleading. it means click on the top part of the watch not the up arrow that appears

the stars are pretty

Look at the back of the clock, you'll see some numbers and a
couple of squares with part of the square a different color. You have to
put the little hand at 9 and the little hand at 3, then you have. To
do this, you have to raise the stopper on the top in frontal view.
After you change the hands, look at the squares. It's up, left, right, up, down,
down. Something will click and change. Go to the back.

Click the cover, it will come off. You will see a couple of buttons, and
a start button. 6:00 sky refers to the time, and it should be 6:00 PM, you'll
see the diagram in the sky. That refers to the order of buttons you push.
Click the middle to get a better look. Go to the rear view mode, and the
first button is the start button, and so on. Take the screws out of the hinges.

Take off the gear wheels. Remove the cover. Remove the other gear wheels.
The bottom compartment has some times and letters to choose. The time is 17:00 (5 PM).
Put the clock on that time. Look in the loop of the second counting hand. The number
is 6. The next time is 19:00 (7 PM). Do the same, and you see an 'S', or rather a '5'.
The next time, 11:45, gives us the number 3. 12:15 gives you number 8. Enter those letters.

I'm just stuck at the one with the numbers on the back, not the letters

I kept putting both hands at 12, then 9, etc. to see if any numbers would be displayed, but nothing. Then I looked at the numbers where the position was on the watch and picked the letter that coincided with the lighter side (12 'o clock, 9 'o clock, 6 'o clock, and again 9 'o clock). That didn't work. Then I chose the darker side and that worked. So the letters are X I V X.

If you click the small dial a little bit, you'll look at the front and see a marking on the clock that moves. You have to line them up. I put the clock hands, and the tabs all lined up. I kept trying to use 1926, you know, 1 click left, 9 right, 2 left, and 6 right and in reverse, etc. over and over. So the time is 6:00, and everything lined up. Click the glass and remove. Tough one!

Draw a line from each darkened half of the circle to the next circle close to it. This will form crude letters. The first is 'C', the next makes the letter 'E', the next 'O', and then 'H'. Makes sense, but I didn't have the front of the watch to look at to see if there was some sort of code.