Burlington Northern SW-10 581 appears here at Cicero Yard on July 24, 1990. I captured the image during a field trip with my Rand McNally staff while we were assembling data for the "Railroad MileMaker" computerized routing product (later leased to GATX). The switcher was originally CB&Q 9317, built in 1966. After the 1996 BN-AT&SF merger it became either BNSF 3649 or 3650 (sources differ) and was reclassified to SW-1000. Subsequently it became GMTX 89, in the GATX Locomotive Group catalog of leasers, where it is listed as an SW-1001.