Before the good folk at Martin fortuitously decided to reintroduce their Vintage styled guitars, the only way to get the specifications that came with those original guitars was to buy an old one, or ask Martin to build one especially for you, a so called "Custom" guitar. This D-45 is one of the latter. The previous owner ordered what amounts to being a new version of a circa 1940 Martin D-45, likely the most sought after acoustic guitar ever made. Scalloped Braces, "Grover Style" Open Back tuners, Through Saddle Bridge. All of which had disappeared on this model in 1942, when the last of the famous original 91 produced. Think Stephen Stills, Neil Young and their cohorts.....Incredible guitar, pure and simple!