The Patent numbers are 5

Correct tubular cross section

Here is a Lionel 6-34694 Louisville & Nashville Legacy F7 AA Diesel Loco Set #834/842

Model Number: 15007

remains flexible

Bachmann 00657 Santa Fe Rail King HO Gauge Diesel Train Set ProductID_11439069 The Patent numbers are 5This 130 piece set has everything you need to start a model railroad. Includes an EMD GP40 locomotive with headlight, gondola, open quad hopper, reefer, off center cupola caboose, 47 x 38 oval of E Z Track, signal bridge, 36 figures, 24 telephone poles, 48 railroad and street signs, power pack and speed controller and complete instructions. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: Bachmann Model