39-422A BR Mk1 POS Post Office Sorting Van Royal Mail Travelling Post Office No. 80301 Class_Class A4 but not as you know

but not as you know it

Knowing that it would be returned to standard specification

Thankfully No

Die cast pivoted coupling and connecting rods

resulting in large

39-422A BR Mk1 POS Post Office Sorting Van Royal Mail Travelling Post Office No. 80301 Class_Class A4 but not as you knowThe British Railways Mk1 was the designation given to BRs first standard design of main line coaching stock, and one of its most successful. Built from 1951 until the early 1960s to augment and replace the array of Big Four and earlier pre grouping designs inherited from the LMS, LNER, GWR and SR, BR took the best features from several of these types to produce the new steel bodied design. As a result, the Mk1 was stronger and safer than any of the