Unknown Acapella Doo Wop Group - (Del Rockers?) MP3/Flac

Ok, so i bought this acetate for 25 cents and I'm a bit puzzled (not hard to do). There are 2 different sets of writing on this thing. The pencil underneath i can not make out, but on top of the pencil in pen it says Del Rockers, 1981, Ricky - Tom - Frank - Walt + Mike on both sides. Is this really from 1981? I have several other Audiodisc acetates and they look just like this one but are from the early to late 50's. Were they still making these audiodisc acetates in 1981? and the acapella doo wop sounds on this sound hauntingly authentic. Did the Del Rockers nail it in 1981? Or did some band called the Del Rockers mock up this acetate as a goof or trick? I don't know.... Both tunes are pretty good for accapella, which I'm not really a big fan of. I don't really know the names of the songs but i took a stab considering they say the same thing a bunch of times in each song. If any of this rings a bell drop a note and let me know. Thanks.

Unknown Acapella Doo Wop Group - Memories Of You

Unknown Acapella Doo Wop Group - It's Really Love