I have a oldish blade that has taken some abuse before I had it. It has been in a draw for more than 4 years. Information:
Japanese Sword Inventory
Blade type Katana or Tachi
Length 80.5 cm total Nagasa 61.7 cm (cutting edge)
Shinogi Zukuri (standard shape)
Motohaba 2.6 cm Sakihaba 1.8 cm (Bottom to top)
Moto kasane 0.4 cm sakikasane 0.2 cm (Bottom to top)
Sori (curve) (blade is miss shapen but a guess at the undamaged blade is 0.6 cm. Reality 0.2 cm to the middle of blade then another after the middle. Koshi sori (near handle)
Lori mune (Triangle back of blade)
Horimomo None (engravings)
Grain – unknown not polished
Hamon looks Shuguha with what looks like inazuma or nie juba (only partially polished) (straight temper line with little lines visible – needs polish)
Utsuri – unknown
Chu kissaki (boshi unknown) (normal size tip)
Nagako Suriage 19.7 cm kiri (3 ana, (holes) all seemed to have been punched not drilled.) (Tang been shortened)
Yasurime kiri (or could be something else it is in such poor condition) Tang really dark and uneven. File marks not really clear.
Mu Mei (not signed)
Date school period ?
Koshirae – none
Tsuba – none
Comes with habaki only
Date acquired 2006 about £80 but can not really remember.
Comments : really badly abused and a very small light blade, just long enough to be classed as katana. Had dremmell treatment before me. Might not be able to take a polish. The hamon is visible for 14 cm on one side only. The shape has changed due to the abuse it has had. The distance between ana s is 11 cm, so this could have been shortened by 11 cm, so could have been about 73cm originally.
Would you get it polished so that research could be done on it? (I may put a limit of £250 worth of polish just to get some history or do nothing), I can not decide.