Keepsake

The handwritten love letter serves as a keepsake of our relationship.

The antique pocket watch was a keepsake heirloom from my grandfather.

He gave his girlfriend a keepsake as a token of his affection.

He kept the ticket stub from his first concert as a keepsake.

She keeps a small dried flower as a keepsake from their first date.

She holds onto the concert ticket stub as a keepsake of the memorable show.