5-course guitar: Gosewyn Spyker - Amsterdam, 1760
This is a set of plans for the oldest surviving guitar by a Dutch maker.
It was made in 1760 by Gosewyn Spyker in Amsterdam.
The guitar was discovered in the attic of Duyvenvoorde Castle by musicologist and guitarist Jelma van Amersfoort.
A typical baroque guitar, close to the instruments of the French Voboam family, with a string length of 710 mm.