Nearly new 30-year-old tanks?

[OTF]

Assuming they're not bad alloy those tanks are great, practically new. They look like they're in beautiful shape. Get them if the price is right and dive them for years.

 

[Scared Silly]

If he bought them in 1990, beware the 6351-T6 aluminum alloy. Those tanks are more likely to explode. You may want to get pictures of the info on the tanks before you go further.

By 1990 all cylinders made from AL6351 were completely phased out by Luxfer. A few hen's teeth cylinders were made by Walter Kiddie. Cliff Impact made some too until June 1990.

From the paint job I would successfully say those are AL6061 cylinders made by either Luxfer or Catalina (which always used AL6061).

 

[CycleCat]

Assuming 1990 or later born dates, I would offer him $100 for all four. ...you can sell them for scrap and get $80.

I saw someone made bells/wind chimes from old tanks. I'd probably do that instead of scrapping them.

 

[rhwestfall]

I saw someone made bells/wind chimes from old tanks. I'd probably do that instead of scrapping them.

Aluminium has bad sound characteristics...

 

[Couv]

I think @Scared Silly has given the definitive answer.

 

[Mark Newland]

I think @Scared Silly has given the definitive answer.

Maybe so, but only for 4 out of the 3 tanks. [If your confused, look at his signature]

 

[Mark Newland]

Aluminium has bad sound characteristics...

I agree, Jamaican music sounds so much better on steel drums, not aluminium.

 

[Couv]

If your confused, look at his signature

If my what is confused? ;-)

 

[CycleCat]

I went and looked at the tanks today. Sadly, they are all Luxfers made in 1988 and 89. I passed.

 

[CycleCat]

Actually being kept full for all of these years has little impact on the integrity of the metal. More related is the number of cycles. However, the alloy is of more importance. Read this thread before deciding:
Is my cylinder made from the "bad" alloy aka AL6351?

Thanks for this link. I had searched for it but didn't find it. It is what gave me the info I needed to identify these tanks as nothing but pretty scrap metal. And thanks to @Scared Silly for putting the linked post together.