Hey CD,
I have two Murray Monterey cruisers, one I restored for my dad as a father's day gift, the other I customized for myself.
They are very cool, albeit pretty much the bottom line of the cruiser offerings in their era. I believe they were produced from the mid 70's to mid 80's. I am sure there is some way to decode the serial numbers on the head tube, but the Murray bicycle company is currently defunct. You can check out my posts at
mtbr.com for pics
http://forums.mtbr.com/showthread.php?t=19348 http://forums.mtbr.com/showthread.php?t=17851 http://forums.mtbr.com/showthread.php?t=18145 http://forums.mtbr.com/showthread.php?t=19149