caption: The image shows an old envelope with a stamp on it, which is an envelope from Germany with the text "Borkum, Germany, 1d, 2d, 3d, 4d, 5d, 6d, 7d, 8d, 9d, 10d, 11d, 12d, 13d, 14d, 15d, 16d, 17d, 18d, 19d, 20d, 21d, 22d, 23d, 24d, 25d, 26d, 27d, 28d, 29d, 30d, 31d, 32d, 33d, 34d, 35d, 36d, 37d, 38d, 39d, 40d, 41d, 42d, 43d, 44d, 45d, 46d, 47d, 48d, 50d, 51d, 52d, 53d, 54d, 55d, 56d, 57d, 58d, 59d, 60d, 61d, 62d, 73d, 74d, 75d, 76d, 77d, 78d, 79d, 80d, 81d, 82d, 83d, 84d, 85d, 86d, 89d, 90d, 91d, 92d, 93d, 94d, 95d, 96d, 97d, 98d, 99d, and 97d.