Baltimore & Ohio #550-551 "Strata-Dome" coach-lounge with low profile domes (plan #7551). These cars were acquired by Amtrak in the early 70s and renumbered #9420 and 9421.
Missouri Pacific #893-895, International Great Northern #896, Texas & Pacific #200 "Planetarium" 42-seat dome coach (plan #7551-A). Three MP cars were sold to the IC in mid-1967, becoming IC #2210-12.
Wabash #1602 "Blue Bird" dome parlor-drawing room (plan #7551-B). Following the 1964 merger, this car served the N&W. In 1968 it was transferred to the Central of Georgia, keeping the same number, and later saw service on the Southern, still as #1602.
These sides are designed to fit the Con-Cor P-S dome lounge car, which is patterned after the corrugated-side "Pleasure Dome" used on ATSF's Super Chief. The sides can also be trimmed to fit the long-out-of-production Rowa low-profile dome to model the B&O or Amtrak cars.