Watch List notes:

The Akio Seki Collection - Sarawak - Binatang District Council - 4 Gallons of water c.1917 - c.1941 (LaWe - / SS 29 / Pridm -) - Obv. Around centre hole : B. D. C. / Rev. Around the centre hole : 4 Gall - copper 20 mm - Struck at the Royal Mint in London, XF / R3: extremely rare