cover 1901-02 Perf. 11½ ½a. black on pale grey showing error "BFLA" for "BELA", tied by bridge c.d.s. on envelope. Fine and very rare on cover. S.G. 6a. Photo

Details
cover 1901-02 Perf. 11½ ½a. black on pale grey showing error "BFLA" for "BELA", tied by bridge c.d.s. on envelope. Fine and very rare on cover. S.G. 6a. Photo