Auction 333-341 Western Australia & Great Britain - Day 3

1855: 2 d. blue, plate 4, lettered GH, perf. 14, wmk. small crown, in combination with 1858 2 d. blue, plate 7, lettered IJ, perf. 14, wmk, large crown, used on a cover, from Shrewsbury to Warrington, dated 25 March 1860, tied by '708' Shrewsbury duplex in black. To reverse a Warrington arrival cds in black (26 March 1860). Has a light horizontal filing crease in lower portion well clear of adhesives. A fine and rare combination. One of five recorded covers with this franking, however a unique example with plate 4 used with plate 7. 
Reference: Great Britain Victorian Mixed Franking Covers, by Ray Simpson & Karl Louis, illustrated on pg. 110 (fig. 159).
Provenance: Christies, 13 March 1990, lot 1549; Christies, 12 March 1991, lot 302; ex Lady Mairi Bury Collection, Sothebys, 24-26 November 2010, lot 1255.