Tim, Be careful assuming the colours of the cloth in your sample are correct. There were significant variances in the cloth used for the division signs. In particular, 2 CID, 3 CID and 5 CID can be found in a range of tones / colours. 3 CID was particularly difficult to get a consistent colour. It ranged from the horizon bleu to a slate grey. (For example the 3 CID in your image appears to have a lot of blue in it.)
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