Murray Monterey Identification

[Surfboard]

Hi all, need help please, I've looked all over. My neighbor has a Murray Monterey Beach Cruiser that has a head Badge that says Murray Lawrenceburg TN 1988 or 84 or 89. I can't make it out. I've tried google and didn't get too far. Serial numbers are on the side of the headtube U6828088. Any information you could supply would be greatly appreciated.
Thank you.

 

[RustyGold]

There should be another number on the headtube, starting with an M.

Also, should be a silver (or black) sticker at the bottom of the seat tube that has the date on it.

 

[Surfboard]

There should be another number on the headtube, starting with an M.

Also, should be a silver (or black) sticker at the bottom of the seat tube that has the date on it.

Thank you,
I'll check again this afternoon.

 

[Rustinkerer]

There wouldn't be much of a difference between those years, except most of the '84s have olympic themed graphics that year, because they were a sponsor.

 

[Starnger]

If it's 80's, the year should be mentioned on the sticker on the bottom of the seat tube or/and the head badge sticker.