Of the two coaches that suffered the worst damage, one was built on an underframe dating from 1934, having been refitted with a new body in 1953 and involved in a previous collision with a locomotive in 1958; the other was built on an underframe from 1928.
The two coaches that sustained the most damage were built on chassis dating back to 1934 and 1928, respectively. One of them was refurbished with a new body in 1953 and involved in a prior collision with a locomotive in 1958; the other had no such history.