And a slight variation on the theme:
All stamps of Bussahir State, in the Indian Himalayas, were
supposed to be stamped with the RS monogram of the Director of the State Post Office, Raghunath Singh, before they were issued. This 4 Anna of 1895 shows a typically blotchy example:

However, occasionally the monogram was omitted

For no obvious reason, missing monograms seem to be relatively common on this stamp. (Gibbons prices the stamp with the blue monogram at £30, without any monogram at £50, and with this mauve overprint at £60. By way of contrast, the ½ Anna with monogram is priced at £24, and without at £1000.)
For collectors of the cat family on stamps, the feline in the central oval is thought to be a snow leopard.