10c black 'Postal Fiscal' issue with oval 'BIENO 1907-1908' overprint in black with two line 'CONSECO ESCOLAR IMBABURA' school mark in blackish purple, a fine mint copy. (SG Unlisted)
10c black 'Postal Fiscal' issue with oval 'BIENO 1907-1908' overprint in black with two line 'CONSECO ESCOLAR IMBABURA' school mark in blackish purple, a fine mint copy. (SG Unlisted)