from pics i've seen, it looks likes the rg/blue are part of the ''later series'', i say this because the font on the bezel of all the ''newer'' product seems to all be similar...even the proportion of how everything is laid out is slightly different from the first release..look at the distance of the numbers in relative to the center circle, very slight, but none the less, present...i own the ss ''first batch'' and am contemplating a blue variant..the ''later series'', seems to be good otb reps on their own right in terms of build quality, the small details are what put the original over the top...the ss first batch shares very very similar reflection angles to the gen...moreover, as far as replacement parts are concerned, for the first batch, i'd just buy oem replacement parts from an ad, still much much cheaper than the gen...panerai153, i saw your review for the oem strap, i believe it changes the feel of the rep by miles...after trying on a gen, the oem strap on the rep makes it feel that much more accurate...