Dinosaur Jr. frontman J Mascis spec'ed out the Squier J Mascis Jazzmaster himself so there's no doubt it's built for his needs and yours too! The design is modelled on the Fender Jazzmaster, a guitar that never saw the popularity of the Strat or Tele and so (along with the Fender jaguar) gained a lot of love from those who like to stand out and have something unique and quirky about their guitars. The basswood body ensures a full-on sound and the C-shaped maple neck and 21 fret fingerboard ensure that this guitar is easy to play and looks amazing.
The guitar is treated to some vintage-cool treatment with vintage-style hardware and aged plastic parts.
Here's what Squier by Fender say about the J Mascis signature Jazzmaster
Squier honors alt-rock godfather and Dinosaur Jr. leader J Mascis with a striking new Jazzmaster guitar model that delivers as much massive sound and performance as its namesake. The pickups, hardware and finish are all specified by Mascis himself for tremendous tone and value. The J Mascis Jazzmaster features a basswood body, C-shaped maple neck, Laurel fingerboard with 9.5" radius and 21 jumbo frets, two single-coil Jazzmaster pickups with three-position switching and dual tone circuits, gold anodized aluminium pickguard, aged white plastic parts (knobs, switch tip, pickup covers), Adjusto-Matic bridge with vintage-style floating tremolo tailpiece, vintage-style tuners, chrome hardware, Vintage White finish and J Mascis signature on the back of the large '60s-style headstock.