Well, L5500's were made from '93 to '97. if you REALLY need to see the date, then you're going to have to take the neck off.
However, check out the registry page of GuitarsbyLeo.com. you can pull up a list of all the registered L5500's (you can register yours if you'd like). Judging by the serial number, assuming the entire number is
B000041 then it could be a long shot. Looking at some of the serial numbers registered, they're all over the place. a #16 in '95 and then a #1121 in '94...
http://www.guitarsbyleo.com/AUTOREG/interact.php3
I read that back then, G&L made a whole bunch of bodies & necks at one time and then just grabbed them out of the bins and put them together as needed. Serial numbers are insignificant when trying to date these basses.
...sweet bass, by the way.