Steve Baker Special (365/28 SBS) possesses the same construction as the original 365, but with low pitched tuning to their natural major keys, available in C, D, G, A, and F. It is named for, and was developed in part by noted harmonicist Steve Baker, who resides in Germany and has contributed to the design of several other Hohner harmonica models, including the Marine Bands Deluxe and Crossover. The Marine Band Octave has two rows of reeds tuned an octave apart. Available in the keys of C and G. "Modular" harmonica system In the mid-1990s, responding to the competing new Lee Oskar Harmonica System by Tombo, Hohner introduced an interchangeably parted series known as the Modular System, usually abbreviated MS. Over the years, several harps have been added to this system. The Blues Harp has been around since the early 1970s. Until the 1990s, it was functionally identical to the Marine Band, the only differences being the cover plates and the varnish on the front of the wood comb, and the Blues Harp's profile was thinner as well. At one point, Johnny Cash promoted the Blues Harp. In the 1990s, Hohner made the Blues Harp part of its Modular System (MS) line. This new Blues Harp lost its uniqueness, and is interchangeable with the other models in the MS line, but it currently remains the standby of many players who use MS harps. The Pro Harp features lacquer-coated cover plates with a glossy black finish and a plastic comb. Since its inception, it has become a very popular model among rock and roll players. The Pro Harp was another model that was in Hohner's handmade line of harmonicas, and was later adapted to the modular system. The Cross Harp was a nearly identical model to the Pro Harp with the exception of a wood comb and slightly thicker original reed plates. The black coverplate coating was greblon. It was discontinued in 2011. The Big River Harp was introduced as a less expensive alternative to the Blues Harp. It is favored among beginner harmonicists, although many experienced players also prefer the Big River for its higher natural volume. It features a plastic comb and bare metal cover plates. The Blue Midnight was released in 2011 with a limit to the key of C, also on the less expensive side of the market. It features stainless steel cover plates with a wider