1855/1900, used collection of the classic issues including a specialized study of the different colour-shades. Beginning with a 3 Sk. green and then going on to show all the main shades of the subsequent values with fourteen 4 Sk., three 6 Sk., five 8 Sk. and two 24 Sk., while continuing to treat the following issues in at least the same detail. A valuable collection in good condition.
