1960 Rolex 1016 - At Least I Think It Is - Forensics Appreciated

[speedolex]

First off, let me introduce myself. I've been an avid collector of Rolex timepieces since the early 80's, I own several vintage and new pieces, I've participated in multiple forums over the years, I abandoned the buying-side of the hobby a decade ago due to multiple children that occupied my time and an uptrending career that had me quite busy.

Today I received the first vintage watch I've bought as I get back into horology, a nice and clean Explorer 1016. I did not buy this watch for its historical significance (obviously) but rather as a daily-wearer as I've grown weary of my Sub Date day after day for 10 years and the 1016 is just my favorite watch of all time. I wish Rolex made 1016's to this day. If they did, I'd buy one new. The crisp dial and hands is what drew me to this one.

She is nice and clean and was reasonably priced, has some documentation, and was purchased by my seller in 2011 from a reputable dealer you'd know in the forums.

Here's what I know about the watch. If you can help me understand what I've bought I'd appreciate it:

Serial # On Case: 517xxx
Caseback Marking: 1016
Caseback Marking: I 60
Movement Stamp: 1560
Movement # Stamp: D674xxx
Bracelet: 78360
Ends: 501B

Can any sleuths help me out here? And to avoid the slamming, yes, I understand this isn't an all original 1960 model, far from it. I bought it to wear, and I love it right now for that purpose, but if I've got something valuable if I can track down a few parts that isn't a bad thing.

Thanks in advance.