A yellow and white metal diamond set abstract brooch, unsigned, possibly John Donald, in a brown velvet coloured box for John Donald at Tecla, 7 Old Bond Street, London, W1, set with two brilliant cut diamonds, each estimated to weigh 0.62ct, twenty old cut diamonds each estimated to weigh 0.05ct, and sixty-two old eight-cut diamonds ranging from 0.01ct to 0.04ct, 46.3mm long x 40.4mm wide, gross weight 15.5 grams.