That’s a tough one to pinpoint. I’m definitely not an expert, but really can’t think of any Kramers with that particular pickup config,, maybe the 2nd pickup was cut in aftermarket at some point? No clue on that, but the neck/neckplate/and serial number might point to it being off of an 85/86 Focus series? The neckplate in the pic here looks pretty similar to yours.
You can find a lot more info at http://vintagekramer.com ,, but my best advice is to post this in the Kramer Guitar Identification sub-forum over at http://kramerforumz.com ,, you will find bigtime Kramer experts and enthusiasts over there who will be glad to help you figure it all out! Good luck 👍