That's really neat! I like it a lot, don't think I've ever seen or noticed a forklift as old and unique as yours.
I too just picked up a forklift, quite handy. Traded it even for a walk in cooler, mine looks to be a mid 90's Komatsu with a Nissan 4 cylinder overhead valve regular gas engine. It's also rated to pick 6,000 lb. Still need to find a manual, and curious what year it really is.
Grigg