DURO Extruded Ingots

There are niches within collecting vintage silver bars, and collecting extruded bars, particularly kit kat style extruded bars has become a very popular niche within the hobby. The first kit kat bar I ever owned was a California Crown Mint, but the DURO was always the one at the top of my list. There just are not a whole lot of them that have survived. There is not a lot of information on DURO, but they came in 5, 10, 25, and 50 oz sizes. I have yet to see a 100 oz, so not sure they went beyond 50. Here’s my Duro collection for your enjoyment.

The stubby 5 oz pictured at bottom are exceptionally rare and carry a far higher premium. If you come across any, I’m looking to add more to the collection :).

I believe the stubby 5 oz predated the traditional 5 and 10. It’s not proven, just a hunch. The style is much different, slightly more primitive and I mean that in a good way. The hallmark is different with no outlines on the letters or shape enclosing the hallmark. 5 F.T.O. and .999 on the stubby, as well as LOT are different. I have also come across a few images of 10 oz DUROs that had the same style of hallmark and weight/purity stamps with LOT. Again, I believe these were produced in very limited numbers before changing the style to the type 2 five and ten oz that I have pictured at top in the image above.

Reverse of the DURO bars.

Author: Vintage Poured Bars

New blogger with a passion for old poured silver bars. I'm a Bay Area native and self employed. Active buyer of vintage silver poured bars and occasional seller.

9 thoughts on “DURO Extruded Ingots”

  3. I have seen a 5oz extruded Duro without word Duro on the bar. The exact same design, same markings, in the same locations..wondering if this is what I think it is..?

    Any thoughts appreciated.

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    1. There could be multiple explanations for this. I believe most likely company behind Duro likely made these as well. The questions is why they were done without a hallmark. I don’t have that answer, but would love to see an image of this bar.

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      1. Hello,

        Here is a pic of the bar I just purchased.

        The existing hallmarking sure appears to be a DURO without the actual DURO stamp.

        The reverse is blank.

        Feel free to share this on the site, I’m seeking clearer proof of ID.

        Many thanks, Christopher

        Sent from my iPad

        >

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