Proof "No. 1..Less than ¼d., S.F. Black" 6d. solid numeral with 1d. "No. 28..Less than ¼d., S.F. Black", both affixed to large piece with printed (in brown) "UNIVERSAL COLOUR SCHEME, (COMPRISED IN 3 SHEETS)", dated "MARCH, 1908" and with "X" and "XO" notes printed below as described in the introduction to this Series