It's genuine Rolex if that's what you're asking, looks like there's a weak spot around the pearl area though - the beginnings of a bend.
Thanks Tripdog thought you would know, do you know a rough estimate on the value?
It's a B4 version of the insert - look on eBay completed listings to get a general idea of current selling prices, deduct about 15% - 20% because eBay can be expensive on BIN - and yours has scratches so it's not NOS