OA got some (I can't remember, how many) 727-264 (non-advanced models) in the late 60's and operated them well into the Nineties.
In 1990, Olympic acquired three former LH aircraft (727-230(A)). They were called "the German ones" by the crews and flown on the mainline routes at least until 1998 (I saw one in DUS at that time). One of those three 727's was even operated as a VIP aircraft for the Greek government.
Two of them have been transferred to Macedonian Airlines, a subsidiary of OA, and are scheduled to be replaced by 737-400's, some of which already have arrived. I checked the online timetable late last year and they were operated on domestic routes on behalf of the mother company.
Hope this helps...
Homer: Facts are meaningless. You could use facts to prove anything that's even remotely true!