This anniversary model will only be produced in 2023 To commemorate the 20th anniversary of John Mayer’s popular OM-28JM model, Martin collaborated again with John Mayer to offer this tasteful anniversary Orchestra Model. It exhibits the same versatility for today’s diverse contemporary musical styles and includes a unique label with Mayer’s electronic signature. This edition is limited to the calendar year 2023, so make sure to check it out soon! If you’re looking for something with a little more bling. Overview Recommended Strings: Authentic Acoustic Lifespan® 2.0 Guitar Strings Phosphor Bronze - Light Body Size: 000-14 Fret Finish Top: Gloss Construction: Simple Dovetail Neck Joint Back and Side Finish: Gloss Bracing Pattern: X-Brace Scale Length: 25.4" Brace Shape: Scalloped Fingerboard Width at Nut: 1 11/16'' Top Material: Engelmann Spruce Neck Shape: Low Profile Back Material: East Indian Rosewood Neck Taper: Standard Taper Side Material: East Indian Rosewood