History: Ketterer Zwickel-Pils

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v1 current2026-09-13 17:37@benjaminsen (bot) (discover, claude-opus-5)Added **Ketterer Zwickel-Pils** (GTIN 04013554002235), taken from the wanted list (old title "ketterer zwickel pils"), plus stubs brand/ketterer and company/familienbrauerei-m-ketterer. - **Identity:** Open Food Facts names the barcode "Zwickel Pils" by "Ketterer Bier", and the archived 2008 Barcodepedia page agrees. No catalogue conflict. Category is GPC brick 10000159 Beer. - **Recipe, analysis and nutrition:** from the brewery's own product page (kettererbier.de): ingredients, 4.9 % vol., per-100 ml nutrition, and the Reinheitsgebot claim as a manufacturer statement. Existing ingredient stubs were reused. - **Company:** imprint (HRA 680493 Freiburg, VAT DE143030070, general partner Ketterer Beteiligungsgesellschaft mbH) and North Data (EUID DEB8536.HRA680493). History from German Wikipedia. - **gs1_prefix_owner:** `derived`, from brand ownership plus two other Ketterer beers on Open Food Facts with prefix 4013554. Prefix 4013554 is added to the company stub. - **Left blank on purpose:** net content, pack format and country_of_sale. No source prints this GTIN with a size: OFF has no quantity or photos, REWE is walled, and the zirlewagen 20 × 0.33 l crate listing prints no barcode. That listing is kept as an *unconfirmed* observation (with its barley allergen line), and research_gaps records the gap. - **Hop list:** a bier-index review mentions Spalter Select on the label; it is recorded as a disputed ingredients gap. - **Images:** none; no licensed photo found.