The Antikamnia Chemical Company was one of those Saint Louis firms who produced provisional proprietary stamps. Two denominated versions are known. Henry Holcombe wrote, "It is said 500 of the 1/8 cent variety were used, very likely on samples, and 9,000 of the 2 1/2 cent stickers on boxes selling for $1 each." He also conjectures that the ones without denomination may be proofs, and say that they are on white paper. His descriptions indicate that he may not have seen some of these stamps.

The no value stamps clearly say they are for free samples, and Antikamnia would not have willingly paid a tax on anything they gave away, so the 1/8 cent stamps were most likely used on small numbers of pills being sold for 5 cents or less. Also, the no value stamps are on yellow paper, not white.

An auction lot was described as "Antikamnia 2 1/2 cents black on yellowish," but there was no trace of this item when the buyer's collections were later sold piecemeal. Hermann Ivester thinks that it may have been on toned paper, as Antikamnia told Charles Nast that the 1/8 cent stamps were printed on yellow paper to distinguish them from the 2 1/2 cent ones printed on white.

The no value stamp.

The Antikamnia private die stamp was not produced until 1900, and would not have been needed after June 30, 1901.

In the interim Antikamnia used general issue revenues.

An early Antikamnia advertisement.