For the record, six coal burning O5a's were converted to oil in 1950, as were two 4-6-4's (4002 & 4003). The oil burning O5b's were 5614, 5620, 5626, 5627, 5629 and 5632. They were Lines West locomotives, based in Lincoln, NE. All six O5b's were the last Burlington 4-8-4's in regular service, operating in the summer/early Fall of 1957. They were knocked out of service by a delivery of new SD9's.........#5629 is pictured in the BRHS Burlington Bulletin SD7/9/24 issue, playing judas goat, delivering a new SD9 to Lincoln, NE in summer 1957.
As always, Santiago, your work is exemplary.
