2018 the American Performer Jazzmaster was introduced, featuring Yosemite pickups with Greasebucket tone circuit and a vintage-style Stratocaster tremolo bridge. Fender's 2017 "American Professional Series" includes a new version of the Jazzmaster which has a Deep C-shaped neck with 22 narrow-tall frets and features different controls and V-Mod pickups. Fender's 2020 "American Ultra Series" The American Ultra Jazzmaster features a unique "Modern D" neck profile, and the tapered neck heel allows easy access to the highest register. A 10"-14" compound-radius fingerboard with 21 medium-jumbo frets makes for easier soloing at the upper frets, while the Ultra Noiseless Vintage pickups and new wiring options provide a wider variety of available tones. Other features include sealed locking tuning machines, chrome hardware and bone nut Signature editions In July 2007, Fender released the J Mascis signature Jazzmaster, in honour of the Dinosaur Jr frontman. This model is much the same as previous Jazzmaster models aside from its Adjust-o-matic bridge (the Fender equivalent of the Gibson Tune-o-matic bridge), and its unusual purple sparkle finish. It was for a time the only model of Jazzmaster in production with a matching headstock, but later certain color options of the '65 American Vintage Reissue Jazzmaster appeared with that option. After the Fender version was discontinued, Squier released a J Mascis Signature with similar specifications, in antique white with a gold anodized aluminum pickguard. In the past, a Nokie Edwards (of The Ventures) signature model was produced in Japan, without rhythm circuit. April 2008 saw the introduction of the Elvis Costello Jazzmaster, the second signature Jazzmaster model made at the Corona facility – a faithful replication of Elvis Costello's 1960s Jazzmaster used during his 1977 debut album, My Aim is True. This signature Jazzmaster guitar features a solid walnut-stain finished alder body and a modified tremolo bridge for Costello's trademark "spy movie" sound. In June 2009, Fender announced Lee Ranaldo and Thurston Moore signature Jazzmasters, in honour of the guitarists of Sonic Youth. These models were released on July 1, 2009. Both editions have a pickup switch that operates from side to side, a black headstock, and only one volume knob. The difference lies in the pickup, bridge, colour, and the relative placement of the volume knob to the jack input. Ranaldo's instrument has a Sapphire Blue finish and features dual Fender Wide Range humbucking pickups that are re-spec'd to Ranaldo's specifications and a Mustang bridge. Moore's version