See also membership badge made by the same workshop Tomei https://asiamedals.info/threads/japan-disabled-veterans-association-membership-badge.24007/
Silver, gilt, enamel.
Diameter about 10.7 mm.
Weight 3.33 g.
1st variation "ungilded kanji 功勞".
Obverse
功勞 - Merit
reverse
財団法人 - Foundation
日本傷痍軍人会 - Japanese Disabled Veterans Association
Original case.
All known variations of this badge were manufactured by Tenkodo workshop in Kyoto...