Business car #603 was a standard GB&W wooden caboose which received bay windows in the 1937-1940 rebuild program.

In 1947 the caboose was rebuilt as a business car and typically assigned to the Whitehall Division superintendent.  It was painted a unique "coach green" color: It was scrapped in 1972.

Here it is in Wisconsin Rapids in 1967.

For more information, see the Green Bay Route caboose roster.

Joe Stauber photo, October 7, 1966.
From the collection of Scott Janz.