No las conocía! Por lo que googleé, si. Acá dejo otra de 12, con esa pala y boca:"
George Harrison: A Zemaitis 12-string acoustic guitar, commissioned by George as a gift for Denis O'Brien,1974, labelled ZEMAITIS/handmade/standard, the label also signed and inscribed in blue ink Anthony Casimere Zemaitis, KENT '74 and D.O'B from G.H., with stained spruce top, mahogany back and sides, heart-shaped soundhole decorated with mother of pearl dot inlays, 'smiling' ebony pin bridge, mahogany neck with 20-fret ebony fingerboard with dot inlays, headstock with two decorative metal plaques, one engraved with the letter Z, the other engraved D * OBRIEN, with a black hardshell, contoured case with claret plush lining, guitar 44in (112cm) long