Since the E7 manual was mentioned above, here's one in my collection:
Note the inclusion of the PRR keystone on the cover. During the early years of dieselization, some manuals were published in railroad specific editions. My example was issued upon delivery to the Pennsy of the 5900 and 5901, the first two E7s purchased by the railroad. In fact, the title page references these two unit numbers specifically and the illustration of the 5900 and 5901 pictured above is printed on Page 2.
This is Manual No. 2300 with a revision date of January 1, 1946.
Bob
