The Upper Deck SPx Signatures category features every confirmed autograph type produced in SPx, a product built by Upper Deck to preserve the brand’s 1990s hologram identity while adding modern low‑print signature content. SPx autographs are intentionally scarce, with no guaranteed autographs per box, making every signed card a true hit. Confirmed SPx autograph formats include Typography Autographs, Cold Steel Signatures, Rookie Superscripts, and Superscripts, each produced with SPx’s layered foil and PETG hologram construction. Additional signed content appears as autograph parallels of Bound for Glory, Break the Mold, Finite Vets, High Efficiency, Holo’d Hardware, and SPx Force, along with numbered autograph tiers such as Finite Rookie Autographs /99, SPx Rookie Force /99, Salute /25, and All‑Time Holoview /10. Select rookies also receive Blue, Red /25, Gold /10, and Black 1/1 autograph parallels. This category brings together all verified SPx autograph cards, reflecting Upper Deck’s purpose for SPx: premium holographic presentation, low‑numbered signature hits, and a focused checklist built around rookies, stars, and legends.
