Oldest anime you've watched?

Yeah yeah, you know the drill.
Just think of this because of [MENTION=1102]Kalovale[/MENTION]; thread.
Mine's"Haha wo tazunete sanzenri" (I didn't even know this was it's name), I knew it as simply "Marco".
I gotta admit I didn't see this when it aired but my mom actually recorded this serie in betamax... YES FREAKIN' BETAMAX, I feel old..
What I remember the most was the final episode.
I CRY EVERYTIME. AND I MEAN IT. One of the SADDEST anime of all time. Poor mom .
OST:
[video=youtube;whA1gf8Nz_Y]http://www.youtube.com/watch?v=whA1gf8Nz_Y[/video]

The dubbed version I watched.
[video=youtube;OPsQQFakmmA]http://www.youtube.com/watch?v=OPsQQFakmmA[/video]