Burlington Northern SW10 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 SW1000. Subsequently it became GMTX 89, in the GATX Locomotive Group catalog of leasers, where it is listed as an SW1001.