60 KG JNAF Bomb, it is:)
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Image source indacates this to be a 50KG JAAF Bomb, howeaver TM-1985-5 Japanese Explosive Ordance does not agree, this bomb does not resemble JAAF 50KG bomb types in any physical way, and it does resemble JNAF 60 KG bombs in obvious ways, howeaver rivit patern is not entirely like referances shown, but similar enough to be certain it is Navy and 60KG's.
