Hiya,
I managed to buy one (!!!!) of the Monart lots, the rest being about right for what they were IMHO. Just missed them catalogues though.........arrrrgggggh!!
Anyway, I had a very enjoyable phone call from that young Gary (Millarart) last night.
Amongst other things we discussed the labels. Firstly, I felt that the Monart was all post war. Given that that was the case, then this may explain the unusual coding. My thought was the codes might have been swapped over because they used the last of the original enamels from the pre war era. Knowing that new enamels were having to be sourced elsewhere they could have taken this into account and coded the labels accordingly. Then, as we know, when the new enamels were used, no colour code was put on the label.
Just thought, this would also have the added advantage for Paul of differentiating between his work and the pre war items.
Just an hypothesis, that might be worth discussion.
As for the formulas, given the provenance, I believe that they are correct as formula. The Monax will need Frank's thoughts, but there is no mention of an attribution on the longer formula, so it
could have come from any glass works, so would still have historic value - if only the source could be proved

Good to see Andy and Kevin there

Shame about them phones though.........................!!!
Nigel