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Posted

good aftenoon.

Katana in koshirae.  Signed: "Bishu Osafune Tadamitsu 備州長船忠光" and dated "The 8th month of 1481 (文明十三年八月日)."  I can hardly read the mei and the date due to corrosion, but this is what the registration certificate says. 

could you give me an opinion on this blade.

thank you.
rodriguez.

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Posted

Hi Rodriguez (is that your last name? I feel awkward addressing you with your last name)

 

The photographs are low resolution and there is no picture of the whole blade. Thus, as we don't see sugata (shape of the blade), the signature is illegible, nobody will give you an opinion, unless it is a (more or less) guess.

 

The registration paper does not matter, it will be issued to any nihonto and nobody will check the validity of the signature. In your case it states the signature (mei) and date (nengo).

Give people something to work on. 

 

If you want my guess, for what it is worth - the rough hada, masame and the double hamon in connection with what looks like a dull nioiguchi make me think that a mixture of inferior steels has been used to produce this sword (it was a method to economise on expensive high quality steel). Therefore it is most likely a kazuuchimono (mass produced sword) of the late Muromachi period) . The signature is fake (gimei) as the date 1481 points at a time where there were no "bundle swords" yet.

 

I hope that helps.

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