"70th Anniversary John Lennon J-160E: Features". Gibson Guitar Corp. Archived from the original on 2015-06-19. Retrieved 19 June 2015."The 70th Anniversary John Lennon J-160E is built in the exacting image of the groundbreaking original J-160E of the 1950s and '60s. ... Gibson applied a great deal of forward-looking, out-of-the-box thinking to the design of the J-160E in 1954. ... To build one of the world's first truly successful electro-acoustic guitars, Gibson re-drew the blueprint: it crafted a three-layer laminated Sitka spruce top with ladder bracing specifically to resist feedback, used a mahogany back and sides for added warmth and richness, added an adjustable bridge, and installed a P-90 pickup (without traditional cover) beneath the top at the end of the fingerboard, along with a single volume and tone control and a 1/4" output jack. In addition, the guitar's solid mahogany neck was attached at the 15th fret to give performers plenty of access to the highest of the instrument's jumbo frets."