Keepsake

She treasured the handwritten letter as a keepsake of their long-distance relationship.

She keeps the old love letters as a keepsake of their relationship.

The faded letter was a keepsake from her long-distance relationship.

The handwritten letter from her deceased husband became her most precious keepsake.

She kept a lock of his hair as a keepsake of their deep bond.

The engraved watch is a keepsake commemorating his retirement.