Peru 1857 1r Blue & Brown Red Imperforate M Mint. Scott 1 var

Two examples of the Perkins & Bacon Pacific Steam Navigation Company issue, taken from the 5th reprint in 1863, the 1r Blue as issued and the 1r Brown Red which was not issued. The accompanying 2010 Sismondo certificate describes the stamps accurately, although I notice a later dot of ink on the 1r blue underneath the S.