its a Series10 bass neck, i dont know anything about the series10, other than its a 4 string 23-fret bass neck with a rose wood fretboard and the inside of the 23rd fret measures 25" from the nut and the head stock says series10 on it. A few SMALL scratches in the fingerboard, one major crack and paint chip is on the right side of the head stock, nut included, tuners NOT included. pics, go here: www.angelfire.com/art2/guitars9023/bassneck.html