I too agree with the others. A service, a new mainspring and regulating it would likely get your watch in perfect order. For a top notch modern movement like your ETA calibre 2801-2 the B.E. shouldn't be more than about 0.3 ms.
Thanks. I'm actually not the least bit worried about him for his future. He has a clear plan and knows what he wants and what it takes to get there. My middle son is another story. He's very immature for his age. Hoping he turns around some than later.
Thanks for the link, I'll take a look.
Re functionality, the watch is behaving in exactly the same fashion as my very first post, although not surprising as I haven't really done anything to it other than removing the movement