 Photographs suggest that this system took time to develop and was not fully established until after the Bavarian Ostbahn had been merged into the State Railway in 1877.Roman or Arabic numerals were used additionally to indicate the age of the wagon, e.g.an A I was an old, 6-wheeled, goods van for a load of , whilst an A³ was a 10 m long 'modern' van for load ( was 'normal') and an H2 was a log wagon built between 1860 and 1880.