N SCALE
In 1977 - 1978, Southern Pacific shops rebuilt 66 (1963-64 built) SP Class F-70-12 flatcars with bulkheads like the originally built GBEC SP Class F-70-26 bulkhead flatcars. They were renumbered as SP 507733 - 507799 series and with an added “R” to it’s original class. They were 48’-6” between bulkheads.
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