The GRGM08LTD1 is similar to the GRGM21 regular production model, but features a special Seventies Sunburst finish. Other than the finish, the GRGM08LTD1 shares the same specs as the regular GRGM21 model. The other two models in the series were the GRGM08LTD2 (Eighties Pink) and the GRGM08LTD3 (Nineties silver).