According to Martin Guitar historian Mike Longworth in his book, "Martin Guitars" the company made exactly one 00-45 in 1972. Behold, here it is. This guitar is in exceptionally fine condition and features a German spruce top with Indian rosewood back and sides. The guitar has been refretted and the nut has been replaced with a bone (may be antler) unit. A beautiful parlor guitar this Martin is ready for serious fingerpicking and songwriting. It comes with a Calton flight case.