Japanese Non-commissioned Officer's Pilot Badge with Two Hallmarks

See also https://asiamedals.info/threads/japanese-officers-pilot-badge-with-two-hallmarks.27993/

Interesting badge.

Engraved

第五十五期 - Fifty-fifth Term/Class

吉田 - Yoshida

Marked

純銀 - pure silver
金張 - gold plated

Original case.

下士官用操縦徽章 - Non-commissioned Officer's Pilot Badge