310 American Flyer 4-6-2 K5 Pacific Locomotive S Gauge 1946 Brass Button PA Runs well. This is the brass spring button Pennsylvania Tender version with a Doyle scarcity rating of 5. This hard to find 1946 version is in very nice shape, runs well and is a fairly quiet runner. Nice jewel markers on both the front of the locomotive and the rear of the tender. Tender has a ladder and link coupler. The light in the boiler works.