Okay, a bit of a disappointment here.
Last week I tried to lit up the watch, it did it briefly then stopped working and the seconds hand started to move in 5s increments, still keeping time, of course.
As the last battery change was 2 years ago, my conclusion was that the battery was dying on me.
I dutifully ordered a new one. It arrived this morning.
I changed it successfully (which means I managed to avoid scratching the back to death and lose half of the screws).
...
The seconds hand still moves in 5 seconds increments, and the backlight doesn't work
I can think of 2 possibilities:
1) the battery is too old. It was in a sealed pack, delivered this morning and I can see no indication of date on it
2) the light module is gone, and that tricks the watch into thinking the battery is on its way out.
Thoughts?