{"product_id":"seiko-original-gehausedichtung-case-back-gasket-ref-ec3160b-31-6-mm-nos","title":"SEIKO Original Case Back Gasket - Ref. EC3160B – 31.6 mm – NOS","description":"\u003cp data-start=\"467\" data-end=\"803\"\u003e\u003cstrong data-start=\"473\" data-end=\"524\"\u003eThe original SEIKO case gasket (\u003c\/strong\u003e part number \u003cstrong data-start=\"545\" data-end=\"556\"\u003eEC3160B\u003c\/strong\u003e ) is from old stock (NOS) and is designed for numerous classic SEIKO watches. It seals the case back and is a typical replacement part for servicing and professionally repairing vintage SEIKO models.\u003c\/p\u003e\n\n\u003ch3 data-start=\"810\" data-end=\"840\"\u003e Technical specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"844\" data-end=\"867\"\u003e\n\n \u003cstrong data-start=\"844\" data-end=\"859\"\u003eManufacturer:\u003c\/strong\u003e SEIKO\u003c\/li\u003e\n\n\u003cli data-start=\"870\" data-end=\"904\"\u003e\n\n \u003cstrong data-start=\"870\" data-end=\"894\"\u003eOriginal part number:\u003c\/strong\u003e EC3160B\u003c\/li\u003e\n\n\u003cli data-start=\"907\" data-end=\"953\"\u003e\n\n \u003cstrong data-start=\"907\" data-end=\"915\"\u003eType:\u003c\/strong\u003e Case Back Packing Seal\u003c\/li\u003e\n\n\u003cli data-start=\"956\" data-end=\"1014\"\u003e\n\n \u003cstrong data-start=\"956\" data-end=\"968\"\u003eCondition:\u003c\/strong\u003e New Old Stock (unused, in original packaging)\u003c\/li\u003e\n\n\u003cli data-start=\"1017\" data-end=\"1037\"\u003e\n\n \u003cstrong data-start=\"1017\" data-end=\"1027\"\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\n\u003cli data-start=\"1040\" data-end=\"1106\"\u003e\n\n \u003cstrong data-start=\"1040\" data-end=\"1053\"\u003eMaterial:\u003c\/strong\u003e Original SEIKO sealing material (rubber \/ elastomer)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003cp data-start=\"1108\" data-end=\"1117\"\u003e\u003cstrong data-start=\"1108\" data-end=\"1117\"\u003eMass:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"1120\" data-end=\"1161\"\u003e\n\n \u003cstrong data-start=\"1120\" data-end=\"1147\"\u003eInner dimension (diameter):\u003c\/strong\u003e \u003cstrong data-start=\"1148\" data-end=\"1159\"\u003e31.6 mm\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1164\" data-end=\"1210\"\u003e\n\n \u003cstrong data-start=\"1164\" data-end=\"1198\"\u003eSeal width (cross-section):\u003c\/strong\u003e \u003cstrong data-start=\"1199\" data-end=\"1210\"\u003e0.90 mm\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3 data-start=\"1217\" data-end=\"1271\"\u003e Explanation of the SEIKO part number (coding system)\u003c\/h3\u003e\n\n\u003cp data-start=\"1273\" data-end=\"1416\"\u003e The part number \u003cstrong data-start=\"1289\" data-end=\"1300\"\u003eEC3160B\u003c\/strong\u003e follows the classic SEIKO packing code system. Each part of the number has a specific technical meaning:\u003c\/p\u003e\n\n\u003cp data-start=\"1418\" data-end=\"1463\"\u003e \u003cstrong data-start=\"1418\" data-end=\"1423\"\u003eE\u003c\/strong\u003e\u003cbr data-start=\"1423\" data-end=\"1426\"\u003e = Case Back Packing Seal\u003c\/p\u003e\n\n\u003cp data-start=\"1465\" data-end=\"1541\"\u003e \u003cstrong data-start=\"1465\" data-end=\"1470\"\u003eC\u003c\/strong\u003e\u003cbr data-start=\"1470\" data-end=\"1473\"\u003e = Width \/ Thickness of the seal\u003cbr data-start=\"1503\" data-end=\"1506\"\u003e → Code \u003cstrong data-start=\"1513\" data-end=\"1518\"\u003eC\u003c\/strong\u003e corresponds to \u003cstrong data-start=\"1530\" data-end=\"1541\"\u003e0.90 mm\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp data-start=\"1543\" data-end=\"1734\"\u003e \u003cstrong data-start=\"1543\" data-end=\"1551\"\u003e3160\u003c\/strong\u003e \u003cbr data-start=\"1551\" data-end=\"1554\"\u003e= \u003cstrong data-start=\"1556\" data-end=\"1593\"\u003eSize of the seal in millimeters\u003c\/strong\u003e , without decimal point\u003cbr data-start=\"1612\" data-end=\"1615\"\u003e → \u003cstrong data-start=\"1617\" data-end=\"1645\"\u003e3160 = 31.60 mm internal dimension\u003c\/strong\u003e\u003cbr data-start=\"1645\" data-end=\"1648\"\u003e Measurements are taken between \u003cstrong data-start=\"1671\" data-end=\"1700\"\u003ethe 3 o'clock and 9 o'clock positions\u003c\/strong\u003e (inner dimension of the sealing groove).\u003c\/p\u003e\n\n\u003cp data-start=\"1736\" data-end=\"1793\"\u003e \u003cstrong data-start=\"1736\" data-end=\"1741\"\u003eB\u003c\/strong\u003e\u003cbr data-start=\"1741\" data-end=\"1744\"\u003e = Color or material variant\u003cbr data-start=\"1773\" data-end=\"1776\"\u003e → \u003cstrong data-start=\"1778\" data-end=\"1793\"\u003eB = Black\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp data-start=\"1795\" data-end=\"1906\"\u003e \u003cstrong data-start=\"1795\" data-end=\"1815\"\u003eIn summary:\u003c\/strong\u003e\u003cbr data-start=\"1815\" data-end=\"1818\"\u003e EC3160B = black SEIKO housing gasket with \u003cstrong data-start=\"1863\" data-end=\"1883\"\u003e31.6 mm inner dimension\u003c\/strong\u003e and \u003cstrong data-start=\"1888\" data-end=\"1906\"\u003e0.90 mm width\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3 data-start=\"1913\" data-end=\"1948\"\u003e Compatibility \/ Area of ​​application\u003c\/h3\u003e\n\n\u003cp data-start=\"1950\" data-end=\"2145\"\u003e This gasket is used in numerous \u003cstrong data-start=\"1986\" data-end=\"2012\"\u003eSEIKO vintage cases\u003c\/strong\u003e with a corresponding case back diameter, especially in models from the 1960s–1980s (mechanical and quartz).\u003c\/p\u003e\n\n \u003cp data-start=\"2147\" data-end=\"2261\"\u003e⚠️ \u003cstrong data-start=\"2150\" data-end=\"2162\"\u003eNote:\u003c\/strong\u003e\u003cbr data-start=\"2162\" data-end=\"2165\"\u003e The size is \u003cstrong data-start=\"2187\" data-end=\"2201\"\u003edetermined by measurements\u003c\/strong\u003e , not solely by model name. Please check before purchasing:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"2264\" data-end=\"2309\"\u003e Check the inner dimension of the case base groove (31.6 mm)\u003c\/li\u003e\n\n\u003cli data-start=\"2312\" data-end=\"2349\"\u003e Compare seal width (0.90 mm)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3 data-start=\"2356\" data-end=\"2373\"\u003e Installation note\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"2377\" data-end=\"2416\"\u003e Clean with \u003cstrong data-start=\"2385\" data-end=\"2405\"\u003eisopropyl alcohol\u003c\/strong\u003e only\u003c\/li\u003e\n\n\u003cli data-start=\"2419\" data-end=\"2474\"\u003e Do not use solvents or harsh cleaners\u003c\/li\u003e\n\n\u003cli data-start=\"2477\" data-end=\"2536\"\u003e For optimal sealing, lightly grease (watch seal grease)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3 data-start=\"2543\" data-end=\"2559\"\u003e Scope of delivery\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"2563\" data-end=\"2611\"\u003e 1 × \u003cstrong data-start=\"2567\" data-end=\"2609\"\u003eSEIKO Original Housing Gasket EC3160B\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"2614\" data-end=\"2644\"\u003e in original SEIKO packaging\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Vintage \u0026 JDM (Japan Domestic Market)","offers":[{"title":"Default Title","offer_id":52264965669202,"sku":null,"price":14.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/9AA77F81-7AD2-4EB4-8CA4-2A0DA361275B.jpg?v=1765644514","url":"https:\/\/japanese-microbrands.com\/en\/products\/seiko-original-gehausedichtung-case-back-gasket-ref-ec3160b-31-6-mm-nos","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}