[What Year Explorer is this ??]

I have owned this explorer for almost 20 yrs and its been refinished and modified with kahler hardware and schaller tuners, but i would really like to find out what year it is. not interested in selling it or the specific value, just which model it is and what year. i think when it was refinished, the serial number decal was sanded off the neck. can you kindly tell me from these pictures what year Gibson Explorer this is? I have about 20 pictures, just cant upload them all.

Thanks so much.