The 2 WP&Y container flats we have at SVRy have Bettendorf style trucks marked "Estado" ASF and where other similar trucks we have have the journal size cast in such as 4x7, these have 11.5x203. Is this a metric designation? Perhaps it is 11.5mm x 20.3mm which would would be about 4 1/2" x 8". Where did they come from?