Back in those day there were no long range flights so the duty days were 12.00 maximum, so no extra days off were given for any long duties.
If a destination was served daily we would get around 24 hours off but very few places were so there were some fantastic trips with up to 7 full days off.
Destinations with 7 days off were Mauritius and Columbo, Auckland had either 3 or 4 days off and the Caribbean had some good trips.