There is an auction website claiming these are original flown 35mm slide strips used on the Mir space station.
But Kodak Gold 100 (Kodak stock 5095) is a negative stock, not a slide stock. If the above images were really taken on it, they would be NEGATIVES, inverted.
There's definitely something odd about what's being offered. I strongly doubt that it is original colour slide film, but it's also odd to see a positive image on colour negative film which has a strong orange base-colour.
The white hand-written numbers indicate that what we are seeing in the picture is a paper "proof sheet" or some other positive image made from negatives. But the black writing over the images was possibly written on slide film. Maybe the image is a sample of what the actual slides look like, and maybe not, too. You would really need more information.
Recently I heard of someone much younger than me calling slides "negatives" so it wouldn't be surprising if someone else did the opposite. This ancient technology is very confusing, y'know.
I've just gone backwards through my 1990s and 80s 35mm colour negatives. Around the mid-90s I shot on Kodak Gold 200 which grain-wise was just as good as the older 100 and gave me an extra stop of exposure, but I found eventually found some I shot on Kodak Gold 100 on 25 April 1987 - Anzac Day.
On the top above the perforations it says "KODAK GA 100 5095", and running between the top perforations is a magenta line. The line between the bottom perfs is green, and the final computer figures at the bottom look like a blue-grey to me, but my eyes are far from perfect and the true colour is also disguised by the heavy orange base-colour. Can't see the negative numbers, because I always obliterated them and hand-wrote my own with Pelican drawing ink.
If you have the time, look at JayUtah's profile and see if you can contact him directly. He's a very active photographer, so is likely to be able to give better advice than I can - I've been out of the photography trade since 1989.
Smartcooky will also turn here up sooner or later. He's in the trade.
I wouldn't bother too much about the writing. If that's a date on the second line - 15 July 1993 - it could be quite useful.