I'm jealous. Other than an Abu baitcaster I bought in the late 80s I have never seen a conventional reel with a spare spool included.
http://www.youtube.com/watch?v=_qaUmC0YHOg (http://www.youtube.com/watch?v=_qaUmC0YHOg)
I know in the 60's and 70's if you purchased a Penn Squidder with a plastic spool it came with a spare.
yip in South Africa the jigmaster 500a also came with a spare spool. probably from a guilty conscience because they sold the thing with a plastic spool in the first place. it's the most sickening noise if those darn things popped.