EwePee has also had a Espee bay window caboose in Seattle lately, used for shove moves out of Argo Yard, past the engine service area on Diagonal Way and down the industrial trackage alongside East Marginal Way.
BNSF maintains several cabooses ( cabeese ??? ) in Seattle, for use on locals. The Boeing job out of Balmer Yard to Renton often has one, as does the job out of South Seattle ( Tukwila ) to Kent. There is also a recently repainted BNSF caboose, with a 3 - chime airhorn on the roof, that I saw in Auburn Yard on Wednesday. I believe this hack may be used on work trains out of Auburn Yard.
The really cool caboose is the one painted in Great Northern Red & Black, which is assigned to the job out of Stacy St. yard that switches along the 5th Avenue Busway, ( the old UP / MILW passenger leads to Union Station ); this caboose can be seen at the fueling pad South of Spokane St., and also behind Franz Bakery on 6th Avenue South.