I think that Thomas Galloway is correct. U78 and U79 have square periods after "U" and S. The later series has round periods. I would lean towards white paper based on the scan.
Thank you for the replies. Scott Specialized lists U78 as just 2˘ Brown and U79 as 2˘ Brown, Amber. Naturally I assume I have the lower value which in this case would be the amber, $16.00 vs $ $10.00. How yellow is amber on these?
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