Great Britain, 1951, 2s6d-£1 Festival high values complete. On unaddressed first day cover tied by neat 3 May 1951 Camborne cancels, along with new KGVI values also issued that day; fresh and very clean, Very Fine and scarce. SG No. 509-512. Scott No. 286-289  Estimate $250 - 350. $0 (Image)