According to the information presented in the "Keystone," during the first year of operation (1940) of the "East Wind," New Haven grille cars ran as lounge cars north of Worcester and south of New York. (no food service). In between, NH "grille car girls" staffed the cars, providing food service mid-run. It goes on to state that an additional four green New Haven "American Flyer" cars were added later in the summer.
In the 1941 season the following New Haven cars were painted into East Wind yellow at Wilmington Delaware:
...."two NH arch roof baggage cars #5576 and #5577 and four coaches, #8526 through #8529"......In addition, "another two NH coaches (no numbers given) were painted into the E.W. colors at Altoona PA."
In 1942, NO special yellow paint was applied to the East Wind cars for the season, "due to wartime exigencies".
Thus, the "East Wind" only ran in the "canary yellow" paint scheme for just two seasons, 1940 and 1941. This very popular train ran in it's participatig railroads' own colors during the 1942 season. The "East Wind" did not run at all from 1943 through 1945, due to WWII, but did return to service in 1946 using the same several railroad colors as was the case in 1942.
There is such a wealth of information in the PRHTS' Keystone article about this unusual train, I recommend it highly! Also, the two issues of the B&M "Bulletin" dealing with the East Wind are excellent and have some great b&w photos.
Oh,...at the end of the 1940 season, all yellow cars were repainted back into their respective railroads' colors, (none were "held over" during the winter) and in early 1941, some returning cars were again repainted into the canary yellow scheme! My guess for this action is the possible fact that the railoads did not know which of their cars might be needed for the 1941 season (?)