Ministry of Communications Achievement Badges/逓信省效績章

Size 29 x 23.5 mm.

Reverse

逓信省 - Ministry of Communications

Marked with practically unreadable 銀純 - pure silver mark.

Original case.

Case lid

二級 - 2nd class

效績章 - Efficacy/Achievement Badge

Outer case

貳 - 2nd

Made by Naigai workshop https://asiamedals.info/threads/badges-labels-and-marks-of-naigai-medal-works.21286

 

Another example of 2nd class badge.

 

Another cased 2nd class badge made by Naigai workshop.

Size 29.6 x 23.5 mm.
Weight 11.08 g.