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Produced using a single hand pressed OB device. |
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20c Deep Ultramarine OB-E2-BK |
Pale Ultramarine OB-E2a-BK |
Slanted Variety OB-E2var-BK |
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20c Deep Ultramarine OB-E2-RD |
Pale Ultramarine OB-E2a-RD |
Blue OB-E2b-RD |
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