Proof Specimen -- sample sheets of nine (3x3) comprising se-tenant sheets (2) of ½c. + 1c. + 2c. in deep rose and slate-blue, sheets (3) of 4c. + 5c. + 10c. in brown, greenish blue, and reddish vermilion, sheets (3) of 20c. + 30c. + 50c. in claret, pale orange, and deep purple, and sheets (3) of $1 + $2 + $5 in deep claret and yellow, blue and yellow, and red and yellow, also 1909 1st Year of Reign of Emperor Hsuan T'ung se-tenant sheet of 2c. + 3c. +7c. in blue and black; all overprinted "WATERLOW & SONS LTD./SPECIMEN" and with small security punch holes. An exceptional assembly (12 sheets). Photo