David dropping in... busy with decorating ATM, so leaving emulsion splodges all over my keyboard

If you look at
Chance Expressions, p.112, there are a couple examples featured there. As explained, and for everyone else's benefit, I speculated that these were probably rejected and sold off in the factory shop. They have a little quirkiness, but I wouldn't start placing extra value on them!

Lime-green Cordon (as mentioned in my book, but "Mint" is probably a better description?) is quite uncommon, so it's still a good catch.