Takeda Riken Tracking Scope.

Base Unit TR411O #540 500 064
RF Section TR4114T # 499 700 044

Cleanup internally after fire damage from failed component.
Rusty chrome on module extractor bar and adjacent area.
BNC's spoiled plating.
Centre frequency of tracking appears to be offset.
40dB position of RF attenuator has failed O/C.
Replaced ejector "pin" on RF module. 
Knob missing off dB/Div switch.

RF attenuator TSA45-BS-3 available from Japan Y2,200

USer manual available only in Japanese.Useful information can be gleaned from the TR4120A manual.
No service manual available.