1849 - 1866, interesting lot squares with no. 2 (10), 3 (2), 4 (5), 5 (2), 8 (2), 9 (8), 10 (10), 11 (2), as well many superb / superb in every respect (choice copy), kalrer MR postmark, no. 2.4.8.9 in each case in the pair, have a look