It does look new, which leads me to suspect it's a CWC cam core. As far as I know there are only two cam cores - Nissan, denoted by "JAPAN" cast on the core, and aftermarket denoted by "CWC." But, I could be completely wrong. I do know that CWC cam cores are not hardened correctly and fail early in life
By the way, the experts on these engines typically communicate on the Facebook Group "Church of the L Series." Go there if you want more opinions. Like any social media site, you have to filter thru those who think they are experts and those that are experts.