Count Althann's gage is a true gage, with an excellent flavour, less cloying than some gages.
It is somewhat unusual amongst gages in that the green skin colour traditionally associated with green gages is replaced almost entirely by a dusky red/mauve colour with a heavy bloom. This colouration is inherited by one of its offspring, Ariel (as is the excellent flavour).
It is also widely known as Reine Claude dAlthann and Reine Claude Conducta.
The pedigree of Count Althann's gage is unknown, but it was raised in the 1850s in Bohemia (now part of the Czech Republic) by the gardener of Count Althann.