Private collection. Photos courtesy of the owner.
Obverse
Additional image of two electric lightnings and two kanji
高整 for
高等 - Advanced
整備 - Maintenance
Reverse
皇紀2603年 - 1943
第五十四期高等科整備術 - 54th Advanced Course Maintenance
計器電気専習卒業記念 - Radio-electronic Equipment Special Course Graduation Commemorative
第一期生 - 1st class
Engraved
成澤猛 - Takeshi Narusawa
Marked
純銀 - pure silver.