Thanks for all the interesting replies. I will take a look at the King basses someone posted a link to.
Here is all I know about the instrument:
1) the top is carved, not laminated. See the attached photo.
2) the back is also carved and appears to be made of two pieces joined in the midline
3) there is a label on the inside that reads "DON RUSSO, The APTO Company", which seems to be a defunct violin shop.
4) The neck is cracked in the heel.
5) The neck and scroll appear to be original.
6) It was owned by a jazz bass player in southern or central jersey, who died and left it to his nephew, who sold it for a couple of hundred dollars to an electric bass player in staten island, who sold it to me this week.
Arnold, it was I that spoke to you on the phone this evening about the bass with the cracked neck. What a funny coincidence. This was the instrument I was talking about. I've heard excellent things about your work, so I am sad that you are too busy to be able to take this project on. After I spoke to you, I made an appointment to bring the bass to Gage's tomorrow afternoon to get an estimate on the neck work.
Any opinions on whether the neck can be repaired and reset, or needs to be replaced? How about a shim under the fingerboard?
Thank you.