Has anyone seen/own a 9900 Zephyr that has a loco in the front and the back? I picked up a large Burlington Zephyr asst last week and I noticed one of the powered locos has no rear vestibule attached and uses a top pin coupler, but the other has a rear trailing truck and finished vestibule in the back with the hole for a top pin and lower female pin coupler to mount the coaches backwards? Were the locos with vestibules used for 3-car sets without the observation car, and the loco without the attached vestibule for the longer sets with the observation car (because those normally come with the vestibule attached). I noticed a few of the Comet double-ended sets come with one of each style loco.
Examples:
Open rear loco closed observation
trailing truck loco and open front of observation
Comet double ended
loco with rear trailing truck and open front observation, note 4-window instead of 6-window coaches,
The Kimball book merely list the loco as a #562 Power car and having no trailing truck, whether electric or clockwork. But, a footnote at the end of the Zephyr section mentions reports of 562s with both power and trailing trucks that were constructed in a similar fashion to the Comets using 4-window coaches instead of the normal 6-window.
To be honest I never noticed the difference until I started unpacking assortment.
