This vintage Gemini Antioch Bookplate Company bookmark from 1974 is a unique find for any collector. The design, labeled H-91, showcases an abstract pattern in shades of blue on durable paper material. The bookmark is extra durable and perfect for avid readers who frequently use bookmarks.  The shape is rectangle and the theme is Gemini. This bookmark is a great addition to any bookworm's collection and makes for a thoughtful gift. See all photos. Pre-owned. Previously Loved.