I am new to the forum. This place is great. I recently aquired two Rickenbacker guitars. One 650d and another, somewhat mysterious, guitar. If I made this post in the wrong section, I am sorry. I thought this would be best.
Here are the guitars together. Please don't chastise me for replacing the original pickup on the right... I did not do it.

Here is a picture of the serial number on the bridge 4c337, which when plugged into the serial decoder on the Rickenbacker website produces this
"Your guitar is a 400 Series Combo model manufactured in 1953"

Here is a picture of the neck line with some strange paint on the side of the fret board

And a chip on the headstock that reveals the wood grain underneath

My questions are what do I have here? The color scheme is similar to others, but not quite at the same time. Was this guitar painted? If it was, besides the paint on the side of the neck, a good job was done. Besides the pickup, everything else seems to be original. I have the original hardshell case too.
Any help/insight would be greatly appreciated.
Thank you in advance
Anthony