This company must make (some-of) the best non-Japanese chisels in the world, as a socket slash tang design. Now selling for way less on eBay with dutch auction so it's easy to get them much cheaper:
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do a seller search for " tingosa ". Compare prices to the company site prices:
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He told me in an email, the handles are either greenheart or cocobolo. These lower prices include machined infill planes.
Alex