Here is something we rarely see , Its a Martin p/j 4 string electric bass guitar. Its officially called a EB-28 Martin
Personally I have never seen one. But I Just dont get out enough here is some info i ripped off the web on the Martin EB-28 Bass
MartinMODEL – EB-28 FUNCTION – Electric Bass Guitar DESCRIPTION – This listing is for a MARTIN EB-28 Electric Bass Guitar w/ Hard Case.Serial Number: 4015Finish Color: Natural Guitar Weight: 8.5 lbs.Nut Width: 1.5″Scale Length: 33″Fretboard: RosewoodGeneral Neck Shape: Classic C ShapePickup Configuration: 1 x P-Style Split Single Coil (Neck), 1 x J-Style Single Coil (Bridge); Active ElectronicsKnob & Switch Configuration: 2 x Volume, 2 x Tone, 3-way Pickup Selector Switch, 2 x Mini Switches (phase, active/passive)
ACCESSORIES – This item includes a hardshell case with an extra back plate (black); otherwise, it comes only as seen in photos, does not include any other accessories.
PHYSICAL CONDITION – Very Good! There are some normal signs of wear on the body and finish, including a few surface dings and some white blemishing on the backside; the front and back side of neck are in great shape; the frets, tuners, knobs and switches are in great condition, there is, however, some very light oxidation on the bridge.
The back electronics cover does not appear to be original and is missing a few screws.
Overall, the structural integrity of this item is excellent. Guitar Case Condition – Very Good! Other than some normal signs of wear, it’s in great shape. WORKING CONDITION – Excellent: It tested working great! The bass plays well with average action height. It has a wide variety of tone possibilities with the active electronics.