SARAWAK SG204/6 1964-65 Wmk w12 1c 2c 6c in matching Plate blocks of 4

1964-65 Wmk w12 1c 2c 6c in matching lower right corner blocks of 4 with plate number 1 each centrally cancelled by very fine PADUNGAN/KUCHING.SARAWAK cds dated 15 OC 65 . Couple of trivial blemishes but attractive and unusual. Purchased from Stanley Gibbons (still on their card)