Model 320 (Or 320A) Stream Switcher By Beckman (Or Rosemount) Is NLA

This is an old mechanical, rotary drum & rocker switch, stream switcher. It was designed as a 5 streams or 10 streams unit.

Here are some part numbers that you might find in this unit:

  • 138515 operator’s manual,
  • 138520 operator’s manual,
  • 123770 front panel,
  • 117956 SLIDE RAIL,
  • 117957 CHASSIS MOUNTING PLATE,
  • 081810 manual.

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