https://commons.m.wikimedia.org/wiki/File:%E6%98%AD%E5%92%8C50%E5%B9%B4%E4%BB%A3%E9%A0%83_%E4%BA%8C%E5%AD%90%E7%8E%89%E5%B7%9D%E3%83%A9%E3%82%A4%E3%82%BA%E5%86%8D%E9%96%8B%E7%99%BA%E5%89%8D%E3%81%AE%E9%A2%A8%E6%99%AF%EF%BC%91.jpg昭和五十年…