Stone the sour cherries, quarter the apples and remove the core. Then juice in a steam juicer for about 1 1/2 hour.
Filter the juice obtained and place in a large saucepan. Boil down with preserving sugar (can be less) and the spices and fill into hot bottles.
Diluted with water, the syrup tastes very Christmassy.
Tip for making jelly:
If you want to make jelly from the juice, you measure after juicing
900 ml of the juice. Pour into a large saucepan and bring to the boil with 1 kg of 1: 1 preserving sugar and pour into hot glasses. Close the jars and turn them upside down for a few minutes.
I always put a little alcohol in the lids and swirl them out so that they are really sterile.