Overnight 40' exterior post trailer, Mack R model Jan 10, 2019 18:20:10 GMT -7 Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Robert on Jan 10, 2019 18:20:10 GMT -7 This is the Athearn Overnight Transportation Co. 40' exterior post trailer with a Mack pulling it. It looks kind of small next to the 53 foot trailers that are common now.