LEGO 1793 Space Station Zenon Review: A 1995 Unitron Classic

This one is a blast from the past. Up for review is the LEGO 1793 Space Station Zenon, part of the LEGO Space Unitron lineup - of which, by our count, only 4.5 sets were ever released (the 0.5 being one half of the Crater Critters set we reviewed, which wasn't an official part of Unitron). Released in 1995 and sold only in the United States, Zenon was the second-largest set in the whole subtheme.

Admittedly, we're biased with this one - Unitron holds a special place in our hearts. So much so that we're building all the sets, including the fabled Unitron Transport Base monorail, writing up a review on every one of them, and even putting together a retrospective blog post. But first, we need to get through all the (re)builds and reviews. Consider this the first stop.

What you get in the box

For a mid-90s set, Zenon packs in a lot. You get a surface base topped with a rotating gun turret, a wheeled ground buggy, a small spacecraft, and three Unitron astronauts (including the Unitron Chief). It's a proper playset rather than a single vehicle, and that variety is a big part of the charm.

• Set number: 1793
• Theme: LEGO Space (Unitron subtheme)
• Pieces: 346
• Minifigures: 3 (Unitron astronauts)
• Age: 7+
• Released: 1995 (US-only release)
• Original price: $34.99 USD
• Build time: ~1 hour
• Motor / lights: None

The build

The whole thing comes together in about an hour, which feels just right - long enough to be satisfying, short enough to knock out in one sitting. What stands out is how much these vintage sets do with fewer pieces. There's no parts-count padding here; every brick is pulling its weight to make the base, buggy, and ship all read clearly as distinct models.

Box and instructions

The instruction booklet is classic 90s LEGO, and that's a double-edged sword. It's charming, but it's noticeably more challenging to follow than a modern manual. Older instructions like these don't call out every part you need on each step - there's no per-step parts list or highlighted "add these bricks now" callout that newer sets spoon-feed you. Instead you're expected to eyeball the difference between one picture and the next and figure out which pieces changed, which can trip you up when a small detail is buried behind the main model or a dark part blends into the background. It's not hard, exactly, just more attentive work than today's builds ask for - and a nice reminder of how much LEGO's instruction design has evolved.

That also makes this a build where a scored 6.0 on instructions feels fair. If you're hunting one down on the secondary market, the manual is one of the things worth confirming is included, since booklets for retired sets can be hard to replace.

Is the LEGO 1793 Space Station Zenon worth it?

Value here isn't about pieces-per-dollar - it's about nostalgia and completing a Classic Space collection. Zenon originally retailed for $34.99, but as a US-only, retired Unitron set it now trades for a premium: used copies typically run in the $180–$250 range on the secondary market, with sealed examples climbing far higher. That's collector territory, so it's a set you buy because Unitron means something to you, not because it's a bargain.

If it does scratch that itch, though, it's one of the more complete and playable sets of the era. And if you're just stepping into vintage LEGO Space, our LEGO Space 1785 Crater Critters review covers a cheaper, easier entry point into the same corner of the hobby.

There's no Amazon link for this one - it's a vintage set that's long out of production, so eBay is really your only realistic option. You can find Space Station Zenon and the rest of the Unitron lineup on eBay here.