Badge had three classes.
First two classes were made in pure silver or silver-colored alloy and third class in bronze.
The suspension of 1st class badges reads
一等精勤章 - 1st class badge for diligent work
Reverse (regardless of class) reads
日本海員掖済会 - Japan Seafarers Relief Association
二等精勤章 - 2nd class badge for diligent work
三等精勤章 - 3rd class badge for diligent work
First two classes were made in pure silver or silver-colored alloy and third class in bronze.
The suspension of 1st class badges reads
一等精勤章 - 1st class badge for diligent work
Reverse (regardless of class) reads
日本海員掖済会 - Japan Seafarers Relief Association
二等精勤章 - 2nd class badge for diligent work
三等精勤章 - 3rd class badge for diligent work