ASF A-3 70 ton truck, with early covered roller bearings, as used by ACL and SCL with axle retainers below the bearings.  HO scale.

One important use of these trucks is early ACL L-5 1958 cu ft covered hoppers (Intermountain.)

Package contents: (1) pair of ready-to-run trucks with semi-scale (code 88) nickel silver wheelsets and brake detail.