The most apparent changes showed up on the 1947 Postwar or Modern version of the K-4 and included a solid drop-coupler pilot

This is a USA Trains R1899 G Scale U

They also have adjustable buffers

Perhaps no other locomotive looked so right at the head of the streamlined trains of the late forties and fifties that were the last hurrah of American long-distance passenger service

This Kit Measures: 2-1/2 x 1-1/8 x 2

B.T.S. 7701 S #112 2nd Street House - Kit (Laser-Cut Wood) ProductID_11467342 The most apparent changes showedThis is a B. T. S. 7701 S Scale #112 2nd Street House Kit (Laser Cut Wood) Footprint: 17 x 34' 5. 2 x 10. 4m Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: B. T. S. Model Number: 7701 Scale Era: S Modern Model Type: Building Kits The Trainz SKU for this item is P11957155. Trainz Product Id: 11957155