{"product_id":"item-1223-nmra-ho-standards-gage-mark-iii","title":"NMRA Mark III HO Scale Standards Gauge (RP-25 Contour) – Vintage Model Railroad Track \u0026 Wheel Gauge with Instructions","description":"\u003ch2 data-start=\"145\" data-end=\"167\" class=\"PDq2pG_selectionAnchorContainer\"\u003eProduct Description\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp data-start=\"169\" data-end=\"491\"\u003eEnsure your HO scale railroad performs at its best with this \u003cstrong data-start=\"230\" data-end=\"272\"\u003eNMRA Mark III HO Scale Standards Gauge\u003c\/strong\u003e. Produced by the \u003cstrong data-start=\"290\" data-end=\"336\"\u003eNational Model Railroad Association (NMRA)\u003c\/strong\u003e, this precision gauge is an essential tool for checking wheelsets, track gauge, flangeways, clearances, and coupler heights to NMRA Recommended Practices.\u003c\/p\u003e\n\u003cp data-start=\"493\" data-end=\"744\"\u003eCompatible with \u003cstrong data-start=\"509\" data-end=\"533\"\u003eRP-25 wheel contours\u003c\/strong\u003e, the Mark III gauge is a must-have for hobbyists building, maintaining, or troubleshooting HO scale layouts. This vintage set includes the original \u003cstrong data-start=\"682\" data-end=\"720\"\u003eAugust 1980 RP-2 instruction sheet\u003c\/strong\u003e and original packaging.\u003c\/p\u003e\n\u003chr data-start=\"746\" data-end=\"749\"\u003e\n\u003ch3 data-start=\"751\" data-end=\"763\"\u003eFeatures\u003c\/h3\u003e\n\u003cul data-start=\"764\" data-end=\"1051\"\u003e\n\u003cli data-start=\"764\" data-end=\"781\"\u003eHO Scale (1:87)\u003c\/li\u003e\n\u003cli data-start=\"782\" data-end=\"821\"\u003eGenuine NMRA Mark III Standards Gauge\u003c\/li\u003e\n\u003cli data-start=\"822\" data-end=\"860\"\u003eCompatible with RP-25 Wheel Contours\u003c\/li\u003e\n\u003cli data-start=\"861\" data-end=\"893\"\u003ePrecision-machined metal gauge\u003c\/li\u003e\n\u003cli data-start=\"894\" data-end=\"926\"\u003eChecks multiple NMRA standards\u003c\/li\u003e\n\u003cli data-start=\"927\" data-end=\"964\"\u003eIncludes original instruction sheet\u003c\/li\u003e\n\u003cli data-start=\"965\" data-end=\"994\"\u003eOriginal packaging included\u003c\/li\u003e\n\u003cli data-start=\"995\" data-end=\"1051\"\u003eExcellent tool for layout construction and maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1053\" data-end=\"1056\"\u003e\n\u003ch3 data-start=\"1058\" data-end=\"1077\"\u003eGauge Functions\u003c\/h3\u003e\n\u003cp data-start=\"1078\" data-end=\"1098\"\u003eChecks and verifies:\u003c\/p\u003e\n\u003cul data-start=\"1099\" data-end=\"1302\"\u003e\n\u003cli data-start=\"1099\" data-end=\"1118\"\u003eWheel Gauge (S-3)\u003c\/li\u003e\n\u003cli data-start=\"1119\" data-end=\"1138\"\u003eTrack Gauge (S-4)\u003c\/li\u003e\n\u003cli data-start=\"1139\" data-end=\"1156\"\u003eFlangeway Width\u003c\/li\u003e\n\u003cli data-start=\"1157\" data-end=\"1170\"\u003eCheck Gauge\u003c\/li\u003e\n\u003cli data-start=\"1171\" data-end=\"1187\"\u003eFrog Clearance\u003c\/li\u003e\n\u003cli data-start=\"1188\" data-end=\"1204\"\u003eRail Clearance\u003c\/li\u003e\n\u003cli data-start=\"1205\" data-end=\"1225\"\u003eGuard Rail Spacing\u003c\/li\u003e\n\u003cli data-start=\"1226\" data-end=\"1252\"\u003eTrolley Wire Gauge (S-6)\u003c\/li\u003e\n\u003cli data-start=\"1253\" data-end=\"1302\"\u003eAdditional NMRA Recommended Practice dimensions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1304\" data-end=\"1307\"\u003e\n\u003ch3 data-start=\"1309\" data-end=\"1322\"\u003eCondition\u003c\/h3\u003e\n\u003cul data-start=\"1323\" data-end=\"1613\"\u003e\n\u003cli data-start=\"1323\" data-end=\"1355\"\u003eExcellent pre-owned condition.\u003c\/li\u003e\n\u003cli data-start=\"1356\" data-end=\"1404\"\u003eMetal gauge shows light signs of previous use.\u003c\/li\u003e\n\u003cli data-start=\"1405\" data-end=\"1472\"\u003eOriginal instruction sheet dated \u003cstrong data-start=\"1440\" data-end=\"1462\"\u003eAugust 1980 (RP-2)\u003c\/strong\u003e included.\u003c\/li\u003e\n\u003cli data-start=\"1473\" data-end=\"1533\"\u003eOriginal packaging included with minor shelf\/storage wear.\u003c\/li\u003e\n\u003cli data-start=\"1534\" data-end=\"1613\"\u003ePlease review all photos carefully, as they are part of the item description.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1615\" data-end=\"1618\"\u003e\n\u003ch3 data-start=\"1620\" data-end=\"1638\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul data-start=\"1639\" data-end=\"1901\"\u003e\n\u003cli data-start=\"1639\" data-end=\"1701\"\u003e\n\u003cstrong data-start=\"1641\" data-end=\"1658\"\u003eManufacturer:\u003c\/strong\u003e National Model Railroad Association (NMRA)\u003c\/li\u003e\n\u003cli data-start=\"1702\" data-end=\"1741\"\u003e\n\u003cstrong data-start=\"1704\" data-end=\"1716\"\u003eProduct:\u003c\/strong\u003e Mark III Standards Gauge\u003c\/li\u003e\n\u003cli data-start=\"1742\" data-end=\"1770\"\u003e\n\u003cstrong data-start=\"1744\" data-end=\"1754\"\u003eScale:\u003c\/strong\u003e HO Scale (1:87)\u003c\/li\u003e\n\u003cli data-start=\"1771\" data-end=\"1800\"\u003e\n\u003cstrong data-start=\"1773\" data-end=\"1786\"\u003eStandard:\u003c\/strong\u003e RP-25 Contour\u003c\/li\u003e\n\u003cli data-start=\"1801\" data-end=\"1832\"\u003e\n\u003cstrong data-start=\"1803\" data-end=\"1816\"\u003eMaterial:\u003c\/strong\u003e Precision Metal\u003c\/li\u003e\n\u003cli data-start=\"1833\" data-end=\"1865\"\u003e\n\u003cstrong data-start=\"1835\" data-end=\"1860\"\u003eRecommended Practice:\u003c\/strong\u003e RP-2\u003c\/li\u003e\n\u003cli data-start=\"1866\" data-end=\"1901\"\u003e\n\u003cstrong data-start=\"1868\" data-end=\"1889\"\u003eInstruction Date:\u003c\/strong\u003e August 1980\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1903\" data-end=\"1906\"\u003e\n\u003ch3 data-start=\"1908\" data-end=\"1923\"\u003ePerfect For\u003c\/h3\u003e\n\u003cul data-start=\"1924\" data-end=\"2114\"\u003e\n\u003cli data-start=\"1924\" data-end=\"1954\"\u003eHO scale layout construction\u003c\/li\u003e\n\u003cli data-start=\"1955\" data-end=\"1975\"\u003eTrack installation\u003c\/li\u003e\n\u003cli data-start=\"1976\" data-end=\"1997\"\u003eWheelset adjustment\u003c\/li\u003e\n\u003cli data-start=\"1998\" data-end=\"2022\"\u003eLocomotive maintenance\u003c\/li\u003e\n\u003cli data-start=\"2023\" data-end=\"2057\"\u003eFreight and passenger car tuning\u003c\/li\u003e\n\u003cli data-start=\"2058\" data-end=\"2086\"\u003eDCC layout troubleshooting\u003c\/li\u003e\n\u003cli data-start=\"2087\" data-end=\"2114\"\u003eSerious model railroaders\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bigg Mike's Depot","offers":[{"title":"Default Title","offer_id":47993065406622,"sku":"B946086","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/1266\/2430\/files\/IMG_1728.jpg?v=1784345032","url":"https:\/\/biggmikesdepot.shop\/products\/item-1223-nmra-ho-standards-gage-mark-iii","provider":"Bigg Mike's Depot","version":"1.0","type":"link"}