Based on the flap of material at the front with the logo sewn on, that looks to be a year or two older than mine, Mine was bought direct from the factory and was the first of a slight redesign to that area, so I’m guessing at mid 90’s. Anyway, it looks def from the made in New Zealand generation and IMO all the materials will still be top notch, assuming it’s been looked after. you might want to re seal the seems on the fly, but I haven’t done mine in 20 yrs. It’s got all the features like you thread the poles from one side and they go straight into holsters on the other, so it’s instant. Massive storage pockets inside, mine has a washing line inside as well, inner unclips to make a bigger cooking area, really high quality groundsheet. you can just pitch the outer or just pitch the inner.
NB. I’m assuming the minaret had the same design time line as the Olympus, otherwise I might be way out on my guess