I looked in a old Herpa Wings World Magazine because there is a report that is called "75 years Lufthansa" but unfortunately I could not found your requested information.
I found only this about the 741: On Easter Monday 1970, the first of three initially ordered jumbos arrived in HAM. The official name of the plane was 747-130, registered D-ABYA. Named after the state of North Rhine Westphalia, it took off for its first flight from FRA to JFK on April 26, 1970.
Sorry but no word about the dates when D-ABYA and D-ABYC have leave the LH fleet.
I hope that somebody knows the answer because I am also very interested.
NZ1's mother is a disgusting crack-whore and his father is a worthless alcoholic!