How about creating a custom patch or badge specially for her? You can design it yourself or hire a professional to create it. You can even add a personal touch by incorporating special memories or inside jokes into the patch or badge design. You can then mount it on a beautiful wooden plaque or a velvet box to make it a memorable keepsake. Additionally, you can also search for some vintage or unique badges/patches on various online marketplaces such as Etsy or Ebay which she might like.
Or you can get her a star map with the date of your anniversary.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.