I don't know... could be a Fender neck. Looks like it's been on a different body since the screw holes have been plugged and re-drilled (different location). Like someone else said, rare to find a walnut plug on a non-Fender neck. It's not painted on because you can see the finish cracking around the seam. And it looks like someone hit it with some canned/compressed air to get the finish to crack like that. It's a partscaster made of unknown parts. Might be a great guitar. If you like it, play it and enjoy it.
One of the things you can do is to look for drill holes under the tuners (headstock back). S copies usually use cheap tuning keys. Also, the decal of the SN doesn’t seem right. This is a pic from an Am Strat to make a comparison.