I have one of those and I'm happy with it. Doesn't cost a fortune, about $200+, and it will tell you a bunch of things about the state of a movement. And, even if you're not into repairing, it is very handy when collecting watches. Personally, I consider it a must have. Compare the price to how much you spend on watches!
Might just need to remove those worn links as bracelet is way oversized anyway. Would be good to know if it was fixable though for future reference. Plenty of videos on YouTube showing how to size these bracelets. Sent from my Moto G (5) Plus using Tapatalk
So, today I wore my trusted Amphibian "Scuba Dude" housing a Vostok cal. 2416 while working out tossing my arms around while jogging and walking. It's basically my "beater watch" and I've never serviced it or regulated it but it pretty consistently gains about 17 second per day during normal use. However, during my workout session it, just like the ETA 2772, starts to rush. In this case to about 222 seconds per day. So, I now feel pretty convinced that @saswatch88 was spot on.
Anyway, I'll make a final test with my most prestigious movement in a Hamilton Khaki case; a recently serviced 2824-2 with 0.00 ms B.E, amplitude around 310 degrees dial up and dial down and about 280 degrees in all other positions, and a daily (normal wear) rate of +1.5 seconds.