Paul, they are identified already in the album. Koning Willem III 1872-1888 series. Now, there are quite a few different perforations with this and the next couple of issues that can make some of these fairly rare. The NVPH catalog is the one you need for these varieties. By he way, the 2.50 gulden is the most important one of the set, and it is missing!
Yes but in rare cases there's a possibility there's a mixup with for example a similar looking colonial stamp just like my 1955 Queen Elisabeth II stamp. My Mariana stamps, yet another example of a colonial mixup!
You are correct the stamps shown are in Scotts. ie: the 25c is # 11 and is valued at about $110.00. And yes the 2.5 Guilder# 50 is the most valued at $125.00 but this is from memory.
GeoffHa, what source are you quoting on the 22 12 and the 2.50 ? According to the NVPH Speciale Catalogus 410200 of the 22 1/2 were issued. The 2.50 gulden came in at 256500. The difference in catalog value is almost 3 to 1 over the years!
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