Two un-patched SP motors are in charge of the Miller yard local switching job YMY-59

ex MKT RAY yard

Duncan local with a Cotton Belt running solo northbound on the UP Duncan sub, ex Rock Island

UN-patched Cotton Belt GP-40-2 7286 leads six other units southbound just north of Fort Worth Tx.

Here's a different kind of "heritage" unit. There are still quite a few SP and SSW units running around "unpatched".