1934 Tokyo City Air Defense Corps Union Imperial Review by Prince Chichibu Commemorarive Badge/東京市聯合防護團秩父宮殿下御閲團記念章

Several stamps are known.

1st stamp variation.

Obverse

秩父宮殿下御閲團 - Corps Imperial Review by Prince Chichibu

記念章 - Commemorarive Badge

reverse

昭和九年五月十七日 - May 17, 1934

東京市聯合防護團 - Tokyo City Air Defense Corp Union (Alliance, Confederacy)

Another example of 1st variation badge.

 

2nd stamp variation.

 

3rd stamp variation.

 

The easiest way to differentiate between three variations.

1st variation.

2nd variation.

3rd variation.