Alkmene was raised in Germany in the 1930s. It is sometimes also known as Early Windsor.
The flavour is quite strong and has the Cox tanginess, but is noticeably juicier. Some tasters have compared the flavour to a Granny Smith. The flesh is cream-coloured and quite dense; biting into one of these gives teeth and gums a good work-out !
It ripens a bit earlier than Cox - around early September. It has much more strength and body than most early varieties.
If you like a strong, tart apple, early in the season, then give this a try.