Vintage space-pin collection lost on Main Street

I lost a small vintage space-themed enamel pin set yesterday around 3pm. It’s mounted on a white display card about 2x3 inches, with three pins: a silver rocket, a blue planet, and a yellow alien; the enamel colors are bright but the rocket nose has a tiny chip. The card has a handwritten caption at the bottom: 'Space Pioneers 1963.' The plastic sleeve it sat in tore a bit, and I’m sure I didn’t notice until later. I was outside a tiny vintage shop on Main Street in Roswell, near the plaza behind the bookstore. This set was part of my late grandfather’s collection, so it means a lot to me and I really need to get it back.