I ran into a watch clearance at a Wal-Mart around 3 months ago. They were between $5 to $15 and regular prices ran up to $48. All were either Casio or Timex Iron man. I thought they would make good gifts so bought around 12.
I set them all by my atomic clock and noticed that most of them gain or lose around 7-10 seconds a day. They mostly gain. However one of the Iron Man watches keeps very close to perfect time. In the 3 months I have had it, it has only gotten around 2 seconds off or less than a second a month.
I am going to keep that one. I have already given four away and they all liked them.
You have an interesting hobby.
(grin)