Japanese submarine I-14 - Wikipedia, the free encyclopedia
There is a possibility of the torpedo tube of this submarine.
*Circle Anchor（sign）
Circle has the character or the sign though it is not possible to read.
Kure Naval Arsenal - Wikipedia, the free encyclopedia
Perhaps, an inspection sign here though it is a negligent expectation.
Rare article
Please permit poor English. orz
Cryptanalysis is necessary for you.
set a goal：English at the same level as Johan Cruyff