a token of remembrance

Translations
знак памяти
He gave her a locket as a token of remembrance.
Он подарил ей медальон как знак памяти.
Definitions
An object or item that serves as a reminder of a person, event, or experience, often given or kept to evoke memories or sentiments associated with that particular moment.
Words
remembrance

noun
воспоминание
token

noun
жетон