Seems like the LK underwent the same PU variations like other 4004 and TRC changed as well!
The PU positions of the middle bass look a bit "congested", though!
Also the carving got some different finish (left one),obviously.
"The youth of today should start thinking about the state in which they want to leave this planet to Keith Richards..."! Quote by an unknown musician
I guess they started out with the guitar-like pickup layout and then moved the neck pickup closer to the neck for truss rod access, and the bridge pickup backwards for a wider tonal range.
I saw a pic of a 2-pickup LK prototype. The pickups were in the usual 4004 locations IIRC.
I don't know who built those but a good luthier could build something similar ... that level of building is a little beyond me ... or else I might try my hand at that ... of course mine would have 5 strings ... and of course forget trying to sell these on ebay ...