Piaget: a rare Altiplano wrist watch

Piaget: a rare Altiplano wrist watch skeletonised model 26930, case marked 750, signed Piaget calibre 293P automatic movement marked 22K, with 9/50 to the rotor, signed crystal, the dial with movement visible beneath, with Roman numerals in black to an outer ring, gold leaf hands, sweep centre seconds hand, cabochon gem set crown, the caseback skeletonised with the machined movement visible within, with PIAGET Automatique 750, 26930, 812726 to the caseback edge, on a signed Piaget black strap with blue stitching, signed Piaget clasp marked 750, no box and papers (Case: 34mm excluding crown)