I started my A series collection in early 2021 as I couldn't seem to find a definitive list of every A-series filter produced. So here we are! 
I will aim to complete the catalogue in full. It sounds like a simple idea but there is actually a fair amount of weirdness going on behind the scenes at Cokin in terms of nomenclature, slight revisions, and complete re-designs, as well as the 'B' series A filters! 
List up-to-date as of 31/07/21
A 001 - COEF + 1/3 YELLOW 
A 2   - COEF X 3.5 ORANGE
A 002 - COEF + 1 ORANGE 
A 003 - COEF + 3 RED
A 4   - COEF X 4 GREEN
A 004 - COEF + 2 2/3 GREEN
A 005 - COEF + 3 SEPIA
A 20  - COEF X4 BLUE (80 A)
A 022 - COEF + 1 BLUE (80C)
A 026 - COEF + 1/3 WARM (81 A) 
A 027 - COEF + 1/3 WARM (81 B)
A 028 - COEF + 1/3 WARM (81 C)
A 031 - COEF x 1.5 ORANGE (85 C) 
B 040 - DIFFRACTION COSMOS 
B 041 - DIFFRACTION UNIVERS
A 046 - FLD
A 055 - STAR 16
A 056 - STAR 8
B 56  - STAR 8 
B 57  - STAR 4
B 058 - PARALLEL
A 060 - SPOT-INCOLOR 1
A 061 - SPOT-INCOLOR 2
A 63  - SPOT-GREY
A 64  - SPOT VIOLET 
A 66  - SPOT ORANGE
A 67  - SPOT-BLUE 
A 83  - DIFFUSEUR 1
A 083 - DIFFUSER 1
A 84  - DIFFUSEUR 2
A 084 - DIFFUSER 2
A 87  - PASTEL 2
A 089 - COLOR DIFFUSER
A 092 - DREAMS 2
A 102 - CLOSE-UP + 2
B 102 - CLOSE-UP + 2 
A 103 - CLOSE-UP + 3
B 113 - SPLIT FIELD + 3 
A 120 - GRADUAL G1
A 121 - GRADUAL G2
A 123 - GRADUAL B2
A 125 - GRADUAL T2 
A 128 - GRADUAL P1
A 129 - GRADUAL P2
A 131 - GRADUAL E2
A 133 - GRADUAL Y2
A 160 - LINEAR POLA
A 160 - COEF +1 2/3 POLA
B 160 - COEF X 3.5 POLARIZING
A 161 - POLA RED
A 162 - POLA BLUE
A 163 - POLA YELLOW
A 164 - CIRCULAR POLA
A 170 - POLA RED-GREEN
A 171 - POLA RED-BLUE
A 172 - POLA PURPLE-ORANGE
A 173 - POLA BLUE-YELLOW
A 198 - SUNSET 2
A 201 - MULTIMAGES X 5
A 204 - MUILTIMAGES X 25
A 230 - SK
A 345 - Double Mask
A 346 - Double Exposure
B 397 - PRE SHAPED FRAME 

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