If it were an iconic muscle cars model number, XB73.com or XY70.com for example, then these type of LLNN.coms can be worth a lot to a serious collector.
If it can not be attached to a seriously iconic product then either let it go OR create that iconic product.
Ohh, I got lazy and it bit me in the bottom. An iconic Locomotive shares this model number. You are in luck after all.
Regards.matt