Auction 309-320 - Great Britain 1840–1841 Europe & Overseas - Day 5

1857, 2 d. blue plate 6, perf 14, lettered TJ, used on cover combined with 1858 2 d. blue plate 6, perf 16, lettered CL, from Llanelli to St Brieuc (France), dated 18 January 1859, tied by indistinct numeral, arrival to reverse dated 21 January 1859, vertical and horizontal filing creases, slight soiling, extremely scarce combination, only recorded example of this mixed-franking to date, rated as "Gold Standard" in Mixed-Franking Covers book. SG = £750+ as singles on cover.rnReference: "Mixed-franking Covers", by R.C. Simpson & K.A. Louis, MJ Publications, 2020, illustrated page 97 and recorded on page 104.