No. Model Years Built 552ABCD-554ABCD F3ABBA 1946 555ABCD-557ABCD F7ABBA 1948-49 5762-5763 F9B 1955 5771/2/3/4 F9ABBA 1955 600ABC-601ABC PABA-1 1947 California ZephyrIn 1950, locomotives were renumbered by multiplying the old number by 10 for the first 3 digits, and a last digit of 1 through 4 based on the old unit letter A through D.
The PA locomotives were assigned to the California Zephyr until 1953, when they were replaced with the F3 locomotives.