This lot is accompanied by a Certificate of Ownership, set no. 127/650. This abstract set was designed to commemorate the Spassky-Fischer World Championships, 1972.
Museum Bellerive Zurich, Schach, exhibition catalogue 15 September to 14 November 1982, pl.66.
Christie's South Kensington, 27 September 1995, lot 117.
End of Sale.