Thanks
tobben63 - I'll see if I can make some headway here. For the King Boudewijn (Dutch spelling) / Baudouin (French spelling) Marchand stamps there are three paper types. I have listed all the main colour varieties below with COB code and release year, separated by paper type.
P1 normal dull paper, which shines dull rose under UV (only used prior to 1955):
- 1.50 Fr light grey (#924, 1953)
- 2.00 Fr carmine rose (#925, 1953)
- 4.00 Fr light blue (#926, 1953)
(note: the above also come in P2 versions, but are listed with the same COB number)P2 normal white paper, which shines dull bluish white under UV (used after 1955):
- 2.00 Fr green (#1066, 1958)
- 2.50 Fr yellow-brown (#1028, 1957)
- 3.00 Fr lilac (#1067, 1958)
- 3.50 Fr yellow-green (#1068, 1959)
- 4.50 Fr brown, with 1962 printed in bottom left (#1068A, 1962)
- 5.00 Fr light violet (#1029, 1957)
- 6.00 Fr carmine red (#1069, 1958)
- 6.50 Fr grey (#1069A, 1960)
- 7.00 Fr turquoise blue (#1069B, 1960)
- 7.50 Fr light brown (#1070, 1957)
- 8.00 Fr grey-blue (#1071, 1958)
- 8.50 Fr lilac brown (#1072, 1959)
- 9.00 Fr green grey (#1073, 1959)
- 12.00 Fr bluegreen (#1371, 1966)
- 30.00 Fr orange (#1074, 1958)
P3 phosphor paper, which shines streaky yellow under UV (used after 1965):
- 1.50 Fr light grey (#924P3, 1967)
- 2.00 Fr blue-green (#1066P3, 1966)
- 2.50 Fr yellow-brown (#1028P3, 1969)
- 2.50 Fr yellow brown, with larger value numbers and stronger white halo arond the head (#1571, 1970)
- 3.00 Fr lilac (#1067P3, 1965)
- 3.50 Fr yellow-green (#1068P3, 1967)
- 3.50 Fr light green, with smaller print - 20.5 x 24mm (all others are 21 x 24.5 mm) and stronger halo around the head (#1068B, 1971)
- 4.00 Fr light blue (#926P3, 1967)
- 4.50 Fr brown, with 1962 printed in bottom left (#1068A.P3, 1967)
- 4.50 Fr brown, without 1962 and with larger value number,(#1651, 1972)
- 5.00 Fr light violet (#1029P3, 1966)
- 6.00 Fr carmine red (#1069P3, 1965)
- 7.00 Fr turquoise blue (#1069B.P3, 1967)
- 7.00 Fr cobalt blue, with larger value numbers and stronger white halo arond the head (#1575, 1970)
- 8.00 Fr grey-blue (#1071P3, 1967)
- 12.00 Fr bluegreen (#1371P3, 1966)
- 30.00 Fr orange (#1074P3, 1967)
I've tried to take a representative picture under UV, but boy is that hard!
The below shows P1, P2 and P3 paper - you can clearly see the rose tint on the P1 and the streaky nature on the P3. The P2 is much brighter and the P3 is much more yellow, but it just didn't come through on the picture.