Well - here's my feedback.
Saturday afternoon, the watch had run about 50 hours. Since I needed to go out (and wanted to wear the watch), I went ahead and rewound it. I was just happy to see this new watch go that long, for the first time and figured the power reserve was about ready to run out. I did what everybody has repeatedly said - I just wound the watch till it wouldn't go any more. It seems there is a "tiny" spring back at the very end, versus a "dead stop", but I guess that is a "play on words".
Based on the feedback here, it sounds very likely this watch (with the 3861 movement) should make it 60 plus hours. So that is great news! And if not rewound, that should take it into late Monday night or early Tuesday morning since I fully wound the watch Saturday mid-afternoon. I will let the watch completely stop the next time before I wind it again. I want to see if my new 3861 will make it 60-62 hours as others have posted here (although I am happy with 50 hours).
Again, I appreciate everyone's feedback here. It is my first manual watch (ever)! That fact, plus me being told (when I first bought it) to be careful about never over winding, had me being super cautious about it. So that experience, plus 2) taking it back to AD after the watch never made it even 24 hours and 3) being told I had over wound it.....all set me up for being very concerned about my new/expensive purchase.
But, no doubt, most people would have ditched this watch many years ago, if it had to be "babied" all the time! So, I am feeling much better about it now. I will post back after I get results of my full power reserve the first part of the week. I am really liking my new Speedy. Great looking watch, for sure!