Masatsune

正恒
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◯  永延︱ 豊前
Masatsune
IDMAS1245
ProvinceBuzen
EraEien (987-989)
Active Period987-989

Source Rating Reference/Page
Hawley200MAS1245 

Hawley lists this smith as National Treasure, but there are no known NT by Buzen Masatsune. It was probably mistaken with Bizen Masatsune.