Numbers Builder Built Model Notes 400 Yellow ? ? Acquired 1932 from CMStP&P Railroad 401- 409 FACCo 1923 J Green Bus 410- 419 Yellow 1924 Z-L-210 420- 421 Yellow 1925 Z-L-210 422- 430 Yellow 1924 Z-L-210 Green Bus 431- 439 Yellow 1926 Z-U-219 Green Bus 440 Yellow 1926 Z-U-219 441- 442 Yellow 1926 Z-AF-258 443- 444 Yellow 1926 Z-AF-258 Green Bus 445- 449 Yellow 1927 Z-AF-258 Green Bus 450- 451 Twin 1927 40 452- 458 International ? 54-H Interurban, acquired 1927 460- 469 FACCo 1923 L Green Bus, double decker 470- 474 Yellow 1924 Z-A-199 Green Bus, double decker 475- 479 Twin 1928 40 480- 485 Yellow 1928 Z-AAZ-326 Green Bus 486- 488 Twin 1929 40 Green Bus 489- 495 Twin 1929 40 496- 498 Twin 1929 40 Green Bus 499- 500 Twin 1930 40 Green Bus 501- 503 Twin 1930 40 504- 509 Twin 1931 40 Green Bus 510 Yellow 1931 W 511- 512 Yellow 1931 Z-BZ-633 520- 523 Yellow 1931 W-M-661 524- 527 Twin 1928 40 Acquired 1931 from Wisc.-Mich. Power 528- 533 Twin 1932 40 Green Bus 534- 539 Twin 1932 30 540- 542 Twin 1933 30 543 Ford 1936 ? Interurban 544 Twin 1928 40 Acquired 1933 from Greyhound 545 Yellow 1933 709 Interurban 546- 553 Yellow 1933 711 554- 577 Yellow 1933 711 Assigned to Racine 578- 581 Yellow 1934 721 590- 593 Twin 1929 40 Acquired 1934 from Burlington Rapid Trans. 594 Twin 1928 40 Acquired 1934 from Burlington Rapid Trans. 595 Twin 1929 40 Acquired 1934 from Burlington Rapid Trans. 650- 660 Twin 1935 30-R 661- 678 Twin 1935 23-R Green Bus 680- 685 Twin 1936 30-R Green Bus 686- 699 Twin 1936 30-R 700- 704 Twin 1936 30-R Green Bus 705- 714 Twin 1937 30-R 715- 721 Yellow 1937 733 Assigned to Racine 722- 728 Yellow 1937 733 729- 734 Ford 1937 70 735- 742 Ford 1938 81 743- 745 Yellow 1938 733 746- 749 Ford 1939 09-BA few additional buses were built before 1923, and are not listed.
Beginning in 1935, transit buses were consecutively numbered, a numbering system which continues today with the Milwaukee County Transit System.
Certain buses were painted for the "Green Bus" routes.
Certain buses were assigned to Racine or to interurban service, and are included for continuity of the numbering system. In addition, the series 600-649 was used for interurban buses acquired between 1924 and 1941.