From the manufacturer:
The Antiquity Jazz Model Neck is an aged version of our brightest, most articulate neck pickup.
The Antiquity Jazz Model humbucker is the neck counterpart to the Antiquity JB, and is designed to give you the look and sound of a vintage 70s classic. It delivers the same balance of warm fullness, and articulation that the Jazz Model has become so famous for, but with a subtle mellowing in the treble response that a custom aged alnico 5 bar magnet creates.Each Antiquity Jazz humbucker is hand built with the same original materials that we used to make them in the 70s, including long legged nickel silver bottom plate, maple spacer, original Jazz model stamp, rough sand cast alnico 5 bar magnet, heavily aged butyrate bobbins, and vintage style push-back braided single conductor lead wire. The electronic and cosmetic treatments of our proprietary Antiquity aging process give this pickup the look, sound, and feel of a real-deal 70s Jazz Model.