Taiwan Railways Administration Meritorious Service Badge/台湾鉄道効績章

1st variation marked pure silver.

Reverse

臺灣鉄道 - Taiwan Railways Administration

効績章 - Meritorious Service Badge

Marked 純銀 - pure silver.

 

2nd variation unmarked.

Pin was deformed (most likely by the owner for better fixation).

 

Rare photo of unknown official with the badge.

 

3rd variation marked pure silver and pin with safety lock.

Note that case is also different.

Marked 純銀 - pure silver.