Maple capped necks were offered between 1960 and 1966 as a custom order option. From 1967 to around 1969 or 70 they were offered as standard production. Fender changed their production tooling in 1959 to accommodate rosewood fret boards. There was still some demand for maple boards so it was offered as a custom option. By 1967 the demand was great enough to again make it part of standard production. By around 1970 they again retooled for one piece necks. Since then some re-issues were made with maple cap necks (I have one made in the early 1990's) but other than that I'm not aware of any newer production maple caps.