HP 01900-90902 1969 Model 1900A Pulse Generator (Mainframe) Oper Service Manual.

HP 01900-90904 Model 1900 Pulse Generator (Mainframe) Operating & Service Manual

HP 08007-90002 1972 Model 8007B Pulse Generator Operating & Service Manual.

Keysight 01900-90903 1900A Pulse Generator Mainframe (Pre 1148A) Oper.&Serv. Man

Original Hewlett Packard 1900A Pulse Generator Ops&Service Manual 01900-90902

HP 02621-2 Model 1900A Pulse Generator (MainFrame) Operating & Service Manual

HP Pulse Generator 8005A Operating And Service Manual 1972

HP 01909-90901 1972 Model 1909A Delay Generator (125 MHz) Oper & Service Manual.