I know the one you mean and would love to make it - I seem to remember it more yellow than green.
This might be worth a try (no sultanas but a mutton curry recipe adds them with the curry powder), it's from a 1960's Good Housekeeping cookery book (I don't have a kitchen for 3 weeks or I'd try it out!)
1 onion
half an apple
1 oz butter
2-3 tsps curry powder
1 tbsp flour
half pint stock
cold roast chicken
squeeze of lemon juice
a little cream, if liked
Slice the onion, chop the apple, fry in the hot butter until golden brown
Stir in curry powder & flour
Add stock gradually and bring to the boil, stirring.
Season with salt, cover, & simmer gently for about half an hour
Add chicken, cut into neat pieces, to the pan & heat gently for a few minutes, without boiling, until the meat is thoroughly hot
Stir in the lemon juice and cream, if using.
"Dish with a border of boiled rice and garnish with lemon fans, chopped parsley and parika pepper" (I remember curry being served ina circle of rice!)