1983 it turns out. Plastic outdoor case. It came in 8 and 12 station models apprently.
This one had stickers on it from various service guys over the years. Haven't taken pics yet, but I will. Manual is worn but all there. Handwritten receipt too. Customer was charged $364.00 for it 29 years ago.
Landscaper. Irrigator. Illuminator. Music lover. Coffee drinker.