Scanned object > The stamp on the left is the forgery. The Inverted Head 4 Annas stamp occurs only with a Die I head. It was an error in the production process, during which the sheet was fed into the press twice -- once for each color. This stamp is not genuine, because it shows a Die II head!

Although the "inverted heads" appear to be upside down in genuine stamps, it was the red frames that were inverted. D.N. Jatia found that at least six sheets must have been fed into the press upside-down, inasmuch as six of these stamps from Position 4 showed different lithographic stones were used for the head and frame dies.^[1]

The stamp on the right, which shows a Die II head (cut to shape), appears to be genuine, although the head is not inverted.

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1. ↑ D.N. Jatia, India's Bi-coloured Four-Annas 1854, Calcutta, Philatelic Congress of India [2000], pp. 62-63.]