That stamps used very short period (only 2-3 months). As you can see that envelopes was sent to Germany and came back. All stamps and postmarks are on the envelopes. It has a lot of unusual postmarks plus very rear provisional. In that condition and that way (to Germany and back with all confirmation postmarks) you can buy ONLY from our collection !!
BTW we have that provisional stamps clean, without any postmarks.
Buy it till Wensday, 10 September , 2014 and you will have 10% discount.