I reviewed this thread thoroughly in determining to get gen oysterflex or not. So I wanted to come add to information.
I'll start with I have small wrists: 16cm.
The 116519ln really is beautiful! It came with 4 different sizes of rep OF, all labeled "E-E". I measured the smallest two as 55mm and 60mm (this combo was too large for my wrist). The other two were even larger. I then began the hunt for a genuine oysterflex, which I thought might bring this watch to the next level.
Similar to
Itto - I took the waiting time to hack my noob oysterflex ;-) I cut it open and indeed it does have the metal insert. Then I shortened the noob oysterflex in attempt to make it fit (I just wanted to wear the damn thing - lol)! Unfortunately, because of the metal insert, it is impossible to drill a new hole through the strap. It won't work because the rubber is already split down the center by the metal insert. I tried to melt the two pieces together, but that didn't work either. Oh well, I had some fun while it lasted.
Since all that, I sourced a gen oysterlfex. I was really nervous about sizing, but after a lot of research, I ended up with a size "E-D" for 6h and "E-E" for 12h and it fits really well. I'm currently on the largest size in the clasp and it feels great.
The Oysterflex feels much different than the noob rep. I can notice a huge difference in appearance and feeling. As described by others, it appears as a muted black - almost like a matte black. More specifically, the feeling is so much more soft and supple. The wings/channel on the inside is much more flexible and comfortable.
Here's a pic of it sitting off my wrist: