Apollo 8 3" patch. This patch is unique in the stitching of the moon with an odd secondary crescent. Additionally, the names aren't as spread out along the flight path as other 3" Apollo 8 patches where the "B" in Borman and "S" in Anders are almost horizontal. Additionally, unlike most other 3" versions, this one is fully embroidered where others are twill.
This patch was collected in a set of other 3" patches, also dissimilar from "original" A-B Emblem issues.
I am going to tag this collection with the "apollounk2" tag. Leading candidate is Cape Kennedy Medals based on the Apollo 17 patch in this set being a CKM patch.