Did Rolex stop chamfers/beveled lugs on the last of the 5-digit references?

[rossi46]

I'm shopping around for a 16570 and have noticed something: multiple listings of NOS models from the absolute tail end of the ExpII's production run in 2011 where there appears to be no chamfer/bevel on the lugs. By that year 6-digit references had come out (the GMTII in 2006, I believe) and obviously with 90* lugs.

So my question: is it a known fact that Rolex stopped the chamfers on 5-digit models while they were still around (such as the 16570)? Or is this just a case of photography lighting/angles and bad eyesight on my part?

I know we all track the years when hollow end links --> solid, lug holes --> no holes, Luminova --> Superluminova, 3185 --> 3186, etc... is there a certain year I would want to avoid if I wanted to guarantee I did get a 16570 with chamfers?