Airsoft guns are searchable by serial number but usually by brand. Try looking around and in the gun for trademarks of any kind. Any markings or anything like that and then go take pictures of them, post them on a well known airsoft forum, and you're likely to get good results.
No way to tell from a serail number alone- and you DO realize there is more than one model of Enfield rifle?
Many books have been written on the Lee-Enfield. Good luck.
Unaware of sn data published
There were 4 different .303 Enfield rifles made for the military, and others for civilian use. The link below will take you to an article of serial number blocks for different rifles.
It will be marked on the weapon itself as to who made it.
1917 Winchester 30-06 has a 6 digit serial number I have a Winchester 30-06 w/a 5 digit serial number 485--
Mine is on the left side of the receiver just in front of the opening where the cartridges are loaded.
Look on the butt.
Seerial numbers are not unique to only one rifle. The year of manufacture is frequently stamped on the metal band at the wrist, or the left side of the receiver, depending on which MODEL Lee Enfield you have.