Thanks Huck!
I have a translation by Giordano Berti and it differs a little from Kaplan and I will give it here.
Antonio Trecho treasurer, We would like you, immediately on receipt of this, sent specifically by Horse, to send two packs of Triumph cards, the most beutiful you can find; and if you can't find these Triumphs, send two other packs of playing cards, again the most beautiful you can find. Make sure we have them here for Sunday, the thirteenth day of the current month.
Sincerely yours, on the eleventh day of December 1450,
Francesco Sfortia Vicecomes written by his hand, Cichus,
as partial reply about the cards on the 15th December Sforza wrote to Trecho...
We have thus received the playing cards and we are well content, but we would like you, as soon as possible, to send us the other.......
in dialect it says "tu ce mandi l'altro paro delle fructe"
which means 'Pair of Fruit' in the sense of the English "cream of the crop" or the best-sweetest example - "plums".
So does this mean Triumphs were a particular deck, known to Trecho?
He does not ask for Triumphs of the Gods for example, Or triumphs of the Virtues. It seems to be that there is one and only one sort/type.
Secondly it seems that what he asks for in Triumphs becomes his by right of purchase and that the design must belong to a producer like a illuminator/goldsmith or studio- not that he commissioned these 'Triumphs'.
~Lorredan