SRI LANKA 1973 (PROOF) 15C BANDARANAIKE MEMORIAL HALL IMPERF PLATE BLOCK
15c Opening of Bandaranaike Memorial International Conference Hall imperforate proof plate 3B–3B block x 4 from the De La Rue archives. Previously unrecorded plate sequence. Possibly unique. Small tear at top otherwise fine. Mint never hinged. SG598var; SC477var
Note: recorded plate sequences include 1D–1D, 1A–2A, 3A–2A, 4A–4A, and 7A–7A
