Decipher seat tag?





I pulled out the seats to install the Corbeau's the other night, and under the pass. seat, there is an alum. tag attached to the seat. It is painted black, and has the following information stamped into it:
3974001
L S I M 0883
Does this make sense to anyone? I have no clue as to what it may mean, excepting the first number might be the part number of the seat bucket?
What does the rest of the stuff mean?
Thanks!
Paul



