Arch Bar Easy
Lacy arch-bar trucks, with real springs that provide needed flexibility for sub-par track. They can be replaced (with difficulty) if you need a more (or less) rigid truck.
Included Kadee-quality wheelsets have ribbed-back wheels, as was standard in the pre-war era (meaning WW II). No electrical pickup, but metal wheels if you want to add detection resistors.
This model does not have the self-centering feature found on some Kadee trucks (which I hate). If you want this, buy the KD 551 or 561.