I have Presto. I have 2 exactly alike. They are 23 quart pots. They take 7 quart jars or more importantly 20 pint jars. I had many other canners over the years. When I got my 2 new ones I retired all but one to cook in. The reason my hubby, the shopahaulic, bought these was because they held 20 pints. As our family got smaller we needed smaller amounts of food per meal. I still make things in quarts but not as much...
I love my canners. We only had a choice of a jiggler. I love the jiggler because I could go about my business near the kitchen and hear that it was still staying at the same pressure without having to look at it. Now they have canners that have both guage and jiggler. So now I have 2 canners going at one time, just singing away with 40 pints going at one time...
I use vinegar in the canner, not in the jars, to keep the canner inside free from minerals and to keep it nice and shiny.
They look just like that today. They were the best things "he" ever could have given me. I love them. I refer to them as "the twins". They sing and make beautiful music together.

They each have a little different sound either because they just do or where they are placed on the stove top. I am not sure..
In this picture I just happen to be soaking french fries in the canners because it was easy. I do not actually cook in my canners. I have a pressure cooker for that...