What you have here is the missing link. This is the version of Louie Louie that became the benchmark for future versions. It is by Rockin Robin Roberts and the backup band, though not credited on the label, is none other than The Wailers. The Wailers had just produced a #38 charting instrumental for another label and thus could not be credited. In fact, Etiquette Records was The Wailers' own creation to get out from under their old contract with Golden Crest. This recording of Louie Louie, is, as you can see from the scan above, the first record Etiquette ever released.
Rockin Robin Roberts and the Wailers recorded this version of Louie Louie in Tacoma, Washington in 1960 and released the single in early '61. This recording marks the first published rock recording of the song. It also has a few other historically important notables. Roberts and The Wailers move the song from the calypso beat to the now familiar downbeat. They also moved the song from it's original key of G, to Bb. And Roberts introduces the guitar lead, which is clearly the riff that the Kingsmen and other bands replicated, with the all important "Now let's give it to them, right now!"
The Wailers would go on to garage lore with songs like Hang Up and the wicked Out Of Our Tree. Rockin Robin Roberts, unfortunately, died an early death due to an auto accident in 1967.