Z Scale Z Gauge Micro-Trains Line MTL 12 Days of Christmas Train Set with an F7A Powered Diesel Locomotive, 12 Days of Christmas Boxcars and a matching caboose. Features: The 12 Days of Christmas Set – 14 cars including. MTL EMD F7A 12 Days of Christmas Powered Diesel Locomotive. Twelve (12) MTL boxcars with the 12 days of Christmas Song livery. MTL 12 Days of Christmas Caboose. Magne-Matic operating knuckle couplers. The Locomotive and Train Cars are in New Condition. The F7A powered locomotive is Tested and is Working. Please review the pictures, they are part of the description. Boxes, Data Sheets and Locomotive Instructions. Boxes have shelf wear. The fine print: None. USA: May be estimated from the calculator.