Bidspirit auction | 1881 ¼a blue On HM's

1881 ¼a blue On HM's Service postcard used in 1882 with ERROR ”SiNGature” instead of SiGNature from Roorkee to Allahabad - 1881 ¼a blue On HM's Service postcard used in 1882 with ”A” circle bar cancelled & ERROR ”SiNGature” instead of SiGNature from Roorkee to Allahabad