japanese imperial navy badge
japanese submarine i-14 association badge
japanese submarine i-14 badge
japanese submariner badge
伊十四潜会海軍潜水学校卒業徽章
伊十四潜会章
海軍潜水学校卒業徽章
潜水艦修業徽章
One can quite often find badges with resoldered (or completely restored) catching hooks. This is a direct consequence of forcing down the catching hook for a more secure fastening of the badge to the uniform.
Typical example of such badge from personal collection.
Original case.