Various fiberglas National and Glenwood models, as well as wood body Westwood guitars (all produced by Valco in the 1960s) have come to be known as “map shape” Nationals among collectors because the outline of the body suggests a highly stylized map of the United States. By 1964, National had no less than nine map shape guitars in its catalog, ranging from the Westwood 72 to the most expensive model, the Res-O-Glas Glenwood 99.