Russian guitar usually differs from the wood in the rest of the neck. The neck joint or heel is the point at which the neck is attached to the body of the guitar. The fingerboard is made of hardwood (ebony or rosewood are common), fitted with metal frets of brass or steel. Fret spacing almost always follows the western twelve tone equal temperament (12-tet) system. The surface of the fingerboard may be flat or curved slightly ("radiused"), although the curve on the Russian guitar is usually somewhat less than that of an equivalent western 6-string guitar. Inlayed position markers are common, and
Romantic guitar Gagliano in Naples. This guitar, which was displayed in the Heyer Museum, Cologne before that museum was dispersed, showed some important differences from the modern classical guitar. It had 5 single strings, inlaid brass frets, a long neck relative to string length (the fretboard meeting the body at the 11th fret), a pegged bridge and a characteristic figure-8 shaped tuning head. It lacked only a sixth string to make it identical with the early romantic guitar. The earliest extant six-string guitar was built in 1779 by Gaetano Vinaccia (1759 – after 1831) in Naples, Italy. The Vinaccia family of luthiers