The D15, D16, and D17 models were built in Westerly and had arch backs. They were built as the solid hog variation on the D25. The D25 model has morphed building specs from Solid Hog Flat Back in the '60's and early '70's. To Spruce Top, Hog B/S with laminate arch back from the early '70s to the time that Guild left Westerly. (Some Solid Hog arch back D25s can be found in '71, '72, '73 Westerly's during the models transition period.) As Joe said, confusion between Mahogany and Spruce Tops usually occurs on the D25M models, because they started with Hog Tops and changed to Spruce. They used a dark red stain on the spruce tops (See Joe's pic above) and so some get confused by the stain color and the letter "M". (As I mentioned adding to the D25M confusion some early models from '71-'73 do have hog tops because you could request a hog top during that time period. So, there are a few D25M Hog Tops out there. But primarily after 1973 the letter "M" after the model # D25 referenced the stain color not wood top.) When Guild moved production to Corona CA 2000-2003 they changed the specs of the D25M back to the original flat back solid hog version. Enough rambling, back to your original question. If the seller is reading the model number correctly on the label, and it is a D15M. The guitar is a Solid Mahogany Top, Solid Mahogany Sides, and Laminate Mahogany arched back. They made them in natural and cherry red finishes. The D15 model was primarily done in a flat finish, without binding, rose wood fret board and bridge, tortoise pick guard. Good Luck with your purchase.
