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Posted

I've had this tsuba for a short time and have read previous posts on this particular style giving good information. My question on this one is the unusual small cut-out on the lower jaw of the dragon and what the purpose of this may have been?

 

The cut-out is nicely formed with a square base, approx. 1.5mm x 1.5mm.

 

Tsuba dimensions:

 

Height 71.5mm

 

Width 61mm

 

Mimi 4.5mm - 6mm

 

Some images below.

 

Thanks

 

Colin

 

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Posted

Colin this ones mine by Toshimasa.

Ive seen quite a few tsuba of this design but never with the cut. It may be damage, not sure.

Maybe Ford could shed some light.

 

Greg

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  • Like 1
Posted

To me it looks like a repair that's fallen out. It's almost inevitable that when making alloys from scratch or remelting scrap that flaws or voids sometimes occur in the cast slab. If these only become evident towards the end of the processing of the ingot to plate then it's not at all uncommon for these flaws to be plugged or inlaid with the same material. 

 

 

Also, sentoku is not the same alloy as shinchu/brass. Sentoku only appears in the tosogu in the early Meiji period. Sentoku is characterised by a very district crystalline structure in the metal that also quite visible in the patina. This structure can sometimes also be seen in 'as cast' brass but in that case you're looking at a fake.

 

There are some early Edo tsuba made by Mitsuhiro and son that claim to be made from sentoku-gane but analysis of this alloy has shown it to be a marketing gimmick. They're essentially brass with a little bit of arsenic added, quite unlike later Japanese sentoku or the original Chinese Xuande bronze that it is simulating.

This is a typical example, with dodgy inscription, and a clearly visible plug repair on the seppa-dai at 11 O'clock

 

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  • Like 4
Posted

All

 

Thank you for the responses to my question. A repair or even cut out of a fault seems the logical answer.

 

If I can be bold and say that it's shinchu rather than sentoku, I can't see any of the crystalline structure Ford mentions.

 

Many thanks again.

 

Colin

  • Like 1

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