Brown Materials Co. out of Oklahoma is one of the “B” refiners that are highly collectible and particularly scarce. Pictured below are 3 varieties, a 1st generation 10 oz and second generation 10 and 5 oz. Notice the similarity of mold with Golden Analytical 10 oz? They are the same exact mold and weight/purity stamp. The Brown Materials 5 also shares a similar molds with the GA 5s. I will be sharing examples of all GAs when we get to the “G”box.
The 5 oz is very rare in the second gen. I don’t believe there to be a first generation 5 oz, however. The bar on the right is a first generation 10 oz and extremely rare with ultra high premium.
Here are a few beautiful examples of 10 and 5 oz class Brown Materials ingots shared by Brian R.
Update to this post, I was finally able to acquire a rare skinny 5 oz variety Brown Materials ingot. Only a handful of these are known to exist.
Vintage Silver Bars 
What do 5 & 10 oz bars cost these days?
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The 5s are very scarce and I think in nice condition they can bring $375-$400. The 10s probably $425-$450 would be expected in nice condition.
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