It should say the brand on the top of it. Some older aluminum tanks...well we would need to know the brand before condemning them.
If you can, steel tanks are better for backmount diving. Aluminum singles work great as stage bottles. A steel tank is negative at the end of the dive vs an aluminum tank that you now have to carry more weight to offset it's buoyancy. You are probably going to want two tanks too.
If it was born in '93 it isn't 6351 alloy and it wouldn't matter who made it. A visual and an eddy test could still determine if sustained load cracking was an issue in an older bottle and if it wasn't it would still be fine to use. It's important to avoid cryptic statements in the Basic Forum especially if you aren't willing to expound on all of the information.
Steel bottles may be fine for some types of diving but claiming that steel is better for everyone is simply not true, besides as a diver with 0-24 dives I'm pretty sure they won't be staging anytime soon.
To the OP, the bottle appears to be a standard AL80 likely Luxfer or Catalina. Unless there is known abuse there is no reason to suspect a problem. It will require a hydro and VIP and will serve you for years