Here. (http://cgi.ebay.com/Rickenbacker-Bass-Guitar-model-4001-its-a-vintage-1974_W0QQitemZ280227838681QQihZ018QQcategoryZ2384QQssPageNameZWDVWQQrdZ1QQcmdZViewItem) No affil., just a heads-up.
(http://i19.ebayimg.com/04/i/000/f1/51/2f55_1.JPG)
Full width inlays make this a pre-Apr. '73. Toaster and split bridge can be seen in the pic, with some Photoshop work I think I see sharp corners on the treble pickup surround, which are correct for an early '73 (74's have radiused corners). It should have checkerboard binding but I can't see it in the pic.
I agree with you about the pickup surround. The checkerboard binding could be there but just not picked up by the camera.