NAMM '14 - Martin OM-ECHF Eric Clapton Navy Blues Demo Shawn HammondJanuary 24, 2014VideoWatch the demo of newest collaboration between Martin and Eric Clapton, the OM-ECHF.omgearvideosmartinnamm-2014steel-stringguitarseric-claptonacousticwhats-newElectric GuitarsGearAcoustic GuitarsNAMMVideosReviewsAcoustic