Not your usual Model 15, 28, or 33 gear but I came across and have scanned a few more manuals that might be of interest to someone

146B Remote Control SEKX5, R18, and SE7 - Description and Adjustments (1932)

150B Multiplex Regenerative Repeaters - Theory & Operation (1934)

1104B TRANSLATOR UNIT, RECEIVING DISTRIBUTOR, AND PANEL (MTU-2A and 2-B) (MRD-1E and 1F) (MTUP-2, 4, and 5) - Parts

- sorry, I don't have 176B Description and don't know what this is!