Francisco Simplicio made elegant, modernist guitars which were different from those made by his contemporaries. His rosettes, his head carvings and the distinctive bridge decorations set his guitars apart and add to the difficulty in making a true copy. Here is one more aspect that makes his instruments easily recognizable. The linings used on the top and back to the sides are carved to be concave allowing them to support the wide purfling but at the same time to reduce weight.