How common were British Railways Coach Roundels on Maroon MK1 stock? I see that most of Bachmann's range don't include them but a few do.
Would British Railways Coach Roundels on Maroon MK1 stock been more typical at the beginning of their reign, i.e. early 1960's, or more common towards the end, i.e. late 1960s, shortly before they were painted blue and grey?