PL.198 (SG17) USED BLOCK OF SIX LETTERED AG AH AI BG BH BI. Good used block of six 1854 die 1 1d pl.198 S.C.16 lettered AG AH AI BG BH BI, AG tear and crease, AI and BI vertical bend - block in an unusual PALE RED SHADE, cancelled neat "902" numerals of Witney (Oxon). (Ref 96738).