Original: British Rail Class 139 is the TOPS classificationToday's Railways no74 p59 for PPM60 model lightweight railcars built by Parry People Movers, for use on the British rail network.
Simplified: Class 139 is the TOPS classificationToday's Railways no74 p59 for PPM60 model lightweight railcar units built by Parry People Movers for use on the national rail network in the United Kingdom.