{"product_id":"seiko-original-gehausedichtung-1-stuck-o-ring-ref-ez1825b-genuine-seiko-packing-wp","title":"SEIKO Original Case Gasket (1 piece) \/ O-Ring Ref. EZ1825B – Genuine Seiko Packing (WP)","description":"\u003cp data-start=\"348\" data-end=\"674\"\u003e \u003cstrong data-start=\"368\" data-end=\"412\"\u003eOriginal SEIKO housing seal (O-ring)\u003c\/strong\u003e with reference \u003cstrong data-start=\"430\" data-end=\"441\"\u003eEZ1825B\u003c\/strong\u003e , supplied in the original \u003cstrong data-start=\"467\" data-end=\"496\"\u003eSEIKO WP spare parts bag\u003c\/strong\u003e (純正部品).\u003cbr data-start=\"504\" data-end=\"507\"\u003e This is a \u003cstrong data-start=\"530\" data-end=\"579\"\u003efactory- and housing-specific NOS spare part\u003c\/strong\u003e , as intended by SEIKO for assembly and overhaul – \u003cstrong data-start=\"644\" data-end=\"673\"\u003enot a generic seal\u003c\/strong\u003e .\u003c\/p\u003e\n\n \u003cp data-start=\"676\" data-end=\"902\"\u003eThis gasket is typically used as \u003cstrong data-start=\"715\" data-end=\"732\"\u003ea bottom gasket\u003c\/strong\u003e and is designed for SEIKO enclosures with a precisely defined groove geometry. Correct assignment is only possible via the \u003cstrong data-start=\"866\" data-end=\"893\"\u003eSEIKO packing code\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003ch2 data-start=\"909\" data-end=\"938\"\u003e Technical specifications\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"942\" data-end=\"965\"\u003e\n\n \u003cstrong data-start=\"942\" data-end=\"957\"\u003eManufacturer:\u003c\/strong\u003e SEIKO\u003c\/li\u003e\n\n\u003cli data-start=\"968\" data-end=\"1030\"\u003e\n\n \u003cstrong data-start=\"968\" data-end=\"986\"\u003eReplacement part type:\u003c\/strong\u003e Housing seal \/ O-ring (Packing)\u003c\/li\u003e\n\n\u003cli data-start=\"1033\" data-end=\"1063\"\u003e\n\n \u003cstrong data-start=\"1033\" data-end=\"1049\"\u003ePart number:\u003c\/strong\u003e \u003cstrong data-start=\"1050\" data-end=\"1061\"\u003eEZ1825B\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1066\" data-end=\"1149\"\u003e\n\n \u003cstrong data-start=\"1066\" data-end=\"1079\"\u003eMaterial:\u003c\/strong\u003e Synthetic rubber (SEIKO specification, oil and age resistant)\u003c\/li\u003e\n\n\u003cli data-start=\"1152\" data-end=\"1172\"\u003e\n\n \u003cstrong data-start=\"1152\" data-end=\"1162\"\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\n\u003cli data-start=\"1175\" data-end=\"1220\"\u003e\n\n \u003cstrong data-start=\"1175\" data-end=\"1187\"\u003eCondition:\u003c\/strong\u003e NOS (New Old Stock), unused\u003c\/li\u003e\n\n\u003cli data-start=\"1223\" data-end=\"1277\"\u003e \n\u003cstrong data-start=\"1223\" data-end=\"1240\"\u003eScope of delivery:\u003c\/strong\u003e 1 piece in original SEIKO bag\u003c\/li\u003e\n\n\u003cli data-start=\"1280\" data-end=\"1299\"\u003e\n\n \u003cstrong data-start=\"1280\" data-end=\"1293\"\u003eOrigin:\u003c\/strong\u003e Japan\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\n\u003ch2\u003e Exact allocation \u0026amp; use\u003c\/h2\u003e\n\n\u003cp data-start=\"1340\" data-end=\"1532\"\u003e The reference \u003cstrong data-start=\"1353\" data-end=\"1364\"\u003eEZ1825B\u003c\/strong\u003e belongs to the \u003cstrong data-start=\"1376\" data-end=\"1405\"\u003eSEIKO packing code system\u003c\/strong\u003e for case gaskets and is used in \u003cstrong data-start=\"1453\" data-end=\"1520\"\u003enumerous SEIKO models (especially vintage\/neo-vintage)\u003c\/strong\u003e where:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"1536\" data-end=\"1573\"\u003e a \u003cstrong data-start=\"1541\" data-end=\"1571\"\u003eround O-ring bottom seal\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1576\" data-end=\"1629\"\u003e with precisely defined \u003cstrong data-start=\"1598\" data-end=\"1627\"\u003einternal and external dimensions\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1632\" data-end=\"1687\"\u003e as well as specified \u003cstrong data-start=\"1651\" data-end=\"1687\"\u003ematerial and hardness specifications\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"1689\" data-end=\"1704\"\u003e is planned.\u003c\/p\u003e\n\n\u003cp data-start=\"1706\" data-end=\"1959\"\u003e ⚠️ \u003cstrong data-start=\"1709\" data-end=\"1721\"\u003eNote:\u003c\/strong\u003e \u003cbr data-start=\"1721\" data-end=\"1724\"\u003eSeiko does not assign specific models via model names, but rather via \u003cstrong data-start=\"1808\" data-end=\"1839\"\u003ecase and movement references\u003c\/strong\u003e . Therefore, this gasket is \u003cstrong data-start=\"1866\" data-end=\"1899\"\u003enot universally interchangeable\u003c\/strong\u003e . A dimensional or code check is strongly recommended before installation. \u003c\/p\u003e\n\n\u003ch2 data-start=\"1966\" data-end=\"2036\"\u003e\u003cbr\u003e\u003c\/h2\u003e\n\n\u003ch2 data-start=\"1966\" data-end=\"2036\"\u003e Explanation of the SEIKO packing coding system (example: EZ1825B)\u003c\/h2\u003e\n\n\u003cp data-start=\"2038\" data-end=\"2168\"\u003e SEIKO uses a \u003cstrong data-start=\"2073\" data-end=\"2108\"\u003esystematic coding scheme\u003c\/strong\u003e for seals that clearly describes shape, size, strength and material.\u003c\/p\u003e\n\n\u003ch3 data-start=\"2170\" data-end=\"2208\"\u003e Structure of part number \u003cstrong data-start=\"2197\" data-end=\"2208\"\u003eEZ1825B\u003c\/strong\u003e\n\n\u003c\/h3\u003e\n\n\u003cp data-start=\"2210\" data-end=\"2246\"\u003e \u003cstrong data-start=\"2210\" data-end=\"2244\"\u003e1. First letter – Form code\u003c\/strong\u003e \u003c\/p\u003e\n\n\u003cul data-start=\"2247\" data-end=\"2290\"\u003e\n\n\u003cli data-start=\"2247\" data-end=\"2290\"\u003e\n\n\u003cp data-start=\"2249\" data-end=\"2290\"\u003e \u003cstrong data-start=\"2249\" data-end=\"2254\"\u003eE\u003c\/strong\u003e = Round seal (O-ring, circular)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"2292\" data-end=\"2345\"\u003e \u003cstrong data-start=\"2292\" data-end=\"2343\"\u003e2. Second letter – Cross-section\/profile code\u003c\/strong\u003e \u003c\/p\u003e\n\n\u003cul data-start=\"2346\" data-end=\"2443\"\u003e\n\n\u003cli data-start=\"2346\" data-end=\"2443\"\u003e\n\n \u003cp data-start=\"2348\" data-end=\"2443\"\u003e\u003cstrong data-start=\"2348\" data-end=\"2353\"\u003eZ\u003c\/strong\u003e = Standard O-ring profile according to SEIKO standard\u003cbr data-start=\"2394\" data-end=\"2397\"\u003e (round cross-sectional shape for floor seals)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"2445\" data-end=\"2486\"\u003e \u003cstrong data-start=\"2445\" data-end=\"2484\"\u003e3. Four-digit number – size indication\u003c\/strong\u003e \u003c\/p\u003e\n\n\u003cul data-start=\"2487\" data-end=\"2647\"\u003e\n\n\u003cli data-start=\"2487\" data-end=\"2647\"\u003e\n\n\u003cp data-start=\"2489\" data-end=\"2647\"\u003e \u003cstrong data-start=\"2489\" data-end=\"2497\"\u003e1825\u003c\/strong\u003e = Nominal diameter of the seal\u003cbr data-start=\"2528\" data-end=\"2531\"\u003e → corresponds to the \u003cstrong data-start=\"2550\" data-end=\"2593\"\u003einner diameter or reference dimension of the housing groove\u003c\/strong\u003e (SEIKO internal measurement system, not directly mm-identical)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"2649\" data-end=\"2697\"\u003e \u003cstrong data-start=\"2649\" data-end=\"2695\"\u003e4. Last letter – Material\/hardness code\u003c\/strong\u003e \u003c\/p\u003e\n\n\u003cul data-start=\"2698\" data-end=\"2820\"\u003e\n\n\u003cli data-start=\"2698\" data-end=\"2820\"\u003e\n\n\u003cp data-start=\"2700\" data-end=\"2820\"\u003e \u003cstrong data-start=\"2700\" data-end=\"2705\"\u003eB\u003c\/strong\u003e = Standard SEIKO elastomer\u003cbr data-start=\"2732\" data-end=\"2735\"\u003e (proven mixture for housing seals, good aging and pressure resistance)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"2822\" data-end=\"2959\"\u003e ➡️ Result:\u003cbr data-start=\"2834\" data-end=\"2837\"\u003e \u003cstrong data-start=\"2837\" data-end=\"2848\"\u003eEZ1825B\u003c\/strong\u003e = round SEIKO bottom seal with defined size and material quality for waterproof housing constructions.\u003c\/p\u003e\n\n\u003ch2 data-start=\"2966\" data-end=\"2982\"\u003e Installation note\u003c\/h2\u003e\n\n\u003cul\u003e\n\n \u003cli data-start=\"2986\" data-end=\"3054\"\u003eOnly install using \u003cstrong data-start=\"2994\" data-end=\"3022\"\u003esuitable sealing grease\u003c\/strong\u003e (e.g. silicone grease).\u003c\/li\u003e\n\n\u003cli data-start=\"3057\" data-end=\"3094\"\u003e Remove old seal completely\u003c\/li\u003e\n\n\u003cli data-start=\"3097\" data-end=\"3130\"\u003e Clean the housing groove before assembly\u003c\/li\u003e\n\n\u003cli data-start=\"3133\" data-end=\"3169\"\u003e Do not stretch or twist the seal.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 data-start=\"3176\" data-end=\"3206\"\u003e Note regarding water resistance\u003c\/h2\u003e\n\n\u003cp data-start=\"3208\" data-end=\"3410\"\u003e Installing a new original seal \u003cstrong data-start=\"3248\" data-end=\"3258\"\u003ealone\u003c\/strong\u003e does not guarantee watertightness.\u003cbr data-start=\"3304\" data-end=\"3307\"\u003e For a reliable seal, the condition of the case, back, glass and crown are also crucial.\u003c\/p\u003e","brand":"Vintage \u0026 JDM (Japan Domestic Market)","offers":[{"title":"Default Title","offer_id":52264527069522,"sku":null,"price":12.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/FullSizeRender_9858bf69-421c-43c7-b3e0-6be27b517965.heic?v=1765633684","url":"https:\/\/japanese-microbrands.com\/en\/products\/seiko-original-gehausedichtung-1-stuck-o-ring-ref-ez1825b-genuine-seiko-packing-wp","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}