Zanzibar SG11 4a Opt Type 1 Variety Space between b and a RARE

1895-9 4a Olive-green type 1 opt on India (with small second z and inverted q for b) showing variety SPACE BETWEEN b and a. Fine used with large part 17 Jan 96 CDS. Striking and RARE. Not previously seen by us but referred to by Hall in 1906 on this value only. The postmark date confirms Opt setting 1.