I just bought a Hamilton Khaki Field Auto online, it'll get here next week. I have a few Seiko 7s26 watches that are very accurate, generally within +5 seconds/day, but I've heard the 2824-2 can be all over the place. I just read that there are 4 grades to this movement (Economique, Standard, Elabore, and Top); does the Hamilton stick the lowest grade one in their watches? If so, what kind of accuracy can I expect? Certainly not chronometer grade, but will it at least be within 10 seconds?