The particular salary and office assignment card shown here is from the personnel file of SA Charles B. Winstead. Winstead was the typical "street agent" so the reflection of his salary base would be typical of any special agent who entered the Bureau during the mid 1920s and remained at the street investigative level until leaving. The progression to squad supervisor and higher would obviously entail salary increases however, that's not the case for Winstead who never entered the management arena.
As noted, Winstead's "entrance salary" in 1926 was $2700. ( If you entered the FBI in 1934, the entrance salary was $2900 or so and progressed from that point on.)
The office assignments shown reveal what offices Winstead was assigned to and officially when. Researchers should be aware that a "temporary assignment" to a field office for several weeks or so would NOT be recorded as "being assigned to that office" until placement is permanent!
(The "red arrow" and resulting note is my own insertion - No doubt Winstead's first appearance in Chicago in May, 1934 was classified as "temporary" but by July, he was "permanent." )
Records such as these, along with other official FBI documents, can assist in proving or disproving the many stories about where agents were during their careers and of course speculation on what salaries existed. This particular record, along with other corroborating FBI witness accounts on Winstead, was utilized to prove he was not present at the shootout at the "Little Bohemia" Lodge in April, 1934 as inaccurately depicted in the movie, "Public Enemies." He was, in fact, still in Dallas covering a variety of leads in the Bonnie and Clyde matter, among other cases.
These salary and assignment cards are still part of the personnel files of FBI agents.