The first version was used on some of Kato's smoothside passenger cars (Amtrak Amfleet I, Penn Central, Super Chief, et al) -
The second version was used on Kato's El Capitan, City of Los Angeles and Amtrak baggage cars -
Old version -
Kato catalog #800101 (Super Chief ACF Truck, Silver, 2 ea)
Kato catalog #800103 (ACF Passenger Truck, black w/ Fully-Automatic Knuckle Coupler, 2 ea)
New version -
Kato catalog #800120 (El Capitan Pullman Truck, Silver, w/ Silver coupler, 2 ea)
Kato catalog #800123 (ACF 41-CS-11 Truck, Black w/ coupler - Clip mount, 2 ea).
Kato catalog #800130 (ACF 41-CS-11 Truck, Gray w/ coupler - Clip mount, 1 ea)