Bachmann's HO-scale General Electric B23/30-7 model was originally released as part of the company's Bachmann Plus line introduced in the early 1990s. Currently, the model is part of Bachmann's standard line of offerings. Chessie System models have been part of both the Bachmann Plus and current releases. The most recent release in the standard line was a Chessie B30-7 with C&O reporting marks and roadnumber 8256. The roadnumber 8256 places this Bachmann model prototypically into the early part of Chessie's third order of B30-7 diesels received in 1979. This order, like all others but the first one, came riding on AAR Type B trucks and not the FB2 trucks found on the Bachmann model. Close, but not quite. Bachmann's other roadnumber 8238, featured on an earlier Plus-line B30-7, was a correctly FB2 trucked example coming from the first order Chessie received from GE of this loco.

Chessie System received it first order of General Electric's Dash Seven-series B30-7 in 1978. By 1981, Chessie's B30-7 roster would total 65 examples. To make the Bachmann example an out of the box prototype, it would have to fall into the first order of B30-7 diesels from 1978. Only this first group, numbered 8235-8244, came riding GE's FB2 trucks like the Bachmann model. The four orders following, numbered 8245-8298, came wearing AAR Type B trucks.

The Atlas Master Series B30-7 HO-scale diesels feature accurate roadnumbers and got the AAR Type B trucks correct. Notice the cab window details on the Atlas B30-7 are also more correct for the protoype, than the above featured Bachmann example.