Published by SPI, 1971
This is a base game from SPI that was developed in the early days of wargaming.
Technically, this is not a Tolkien game. However, there are two scenarios that were developed by Scott Rusch, originally published in Jadgpanther Magazine in 1974 (issues #7 and #8). The two Tolkien scenarios are "Rohirrim!" and "Siege of Gondor".
The game represents medieval type warfare and matches well with battles from Middle Earth.
I'll post some more info and pictures soon.