Help with 16750

[3inst3in]

Hi guys, wanted to see if you can help in authenticating a 16750 i'm about to pick up and help confirm the things I've noticed so far below...<br />
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1.) 8.1 mil serial - 1983 watch. It matches the clasp code "H" which also means 1983. The 16750 matte dial comes with a correct 78360 bracelet and 580 end links. The clasp has the "flat 3" for the 3 in 78360.<br />
2.) Appears that hands have been replaced since the luminova can be seen after some sunlight. The markers on the dial are not lighting one bit.<br />
3.) Checked that between both lugs have - ORIG ROLEX DESIGN 16750 and STAINLESS STEEL with serial number.<br />
4.) Appears to be MARK I dial - The "AHC" align and the coronet is tall and slim.<br />
5.) Appears to be correct hand stackup for 16750. Hour - GMT - minute - second<br />
6.)It has a white date wheel with the "round 3", and open 6 and 9's for all dates (6, 9, 16, 19, 26, 29)...the "30" looks different for some reason...the 3 in 30 seems to be more bold in font.<br />
7.) It appears to have correct beat rate, hacking, quickset, the date changes counter clockwise/ upwards...is this right?<br />
8.) When winding the watch, it seems really coarse..not smooth at all...is this normal? I've noticed a few other 16750 owners with the same issue...<br />
9.) bezel appears to be authentic...not sure..<br />
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any help would be great...thanks guys.<br/>uploadfromtaptalk1402870886261.jpg