OEM Panerai bracelet. Been looking for a while and finally found one reasonably priced. I took it into the boutique to have it sized and they confirmed it was authentic as I was a little worried it may have been fake.
From everything I've read about the 438 I think it's DLC. I don't wear the 317 as much as I used to with other watches in and out of the rotation but I use it primarily when I travel out of the country. I'm also interested to see how it holds up over time...