The Martin 000-42 Modern Deluxe adds 42 styling to the Modern Deluxe package.  Built of East Indian rosewood with a Sitka spruce VTS (torrefied) top, and flamed maple binding, it has the traditional abalone top border, plus a torch peghead inlay in abalone bordered with white pearl. Fingerboard & bridge snowflakes are also abalone bordered with pearl.
Modern features include liquid metal bridge pins with abalone dots, and a carbon fiber bridgeplate that boosts volume without adding weight. The new neck shape is designed for maximum hand comfort up and down the fretboard. The 24.9" scale reduces string tension for a light touch.

Attached video from 2019 describes the many special features of the Modern Deluxe Series.