The following two points are now certain about the first generation of music sirens that once existed in 松山市 Matsuyama City, 愛媛県 Ehime Prefecture. 1. A panel in 城山公園 Shiroyama Park (松山城 Matsuyama Castle) states, "After World War II, a music siren was placed at the 太鼓門南続櫓跡South Connecting Turret...

From https://www.asahi.com/articles/ASS441CDKS44ONFB00GM.html The city's Board of Education has designated a music siren in the center of Iga City, Mie Prefecture, as a tangible cultural property (historical material). (omitted). In the late 1950s, when many citizens of Iga City had to flee from air...

Hello! I'm Music Siren fan from Japan. I'm so glad that you guys love them from far away countries and I was surprised by the huge amount of knowledge, so I made an account. Nice to meet you. Supplementary information on patent materials. To be precise, it is called a 実用新案 (Jitsuyoh Shin-an "ut...