If any person, without due authority,—
(a)makes or issues any document of a nature reasonably calculated to cause it to be believed that the document has been issued by, or under the authority of, the Director - General of 2[Posts and Telegraphs], or
(b)makes on any document any mark in imitation of, or similar to, or purporting to be, any stamp or mark of any telegraph office under the Director -General of 1[Posts and Telegraphs], or a mark of a nature reasonably calculated to cause it to be believed that the document so marked has been issued by, or under the authority of, the Director -General of 1[Posts and Telegraphs],
he shall be punished with fine which may e xtend to fifty rupees.]