The ultimate boat anchor...

[bdunham7]

...or is it?

A custom made 4-beam oscilloscope.  With a published manual.

[pcprogrammer]

The coils, at least I assume them to be, look much more like a boat anchor 

[Ed.Kloonk]

[Andy Watson]

A custom made 4-beam oscilloscope.  With a published manual.

Whooa! If I've read the manual correctly, not just the electronics, but the CRT appears to have been a custom made glassware - four individual beams!

[factory]

It appears your right, four sets of intensity/focus controls on the front panel, as well as the four sets of vertical plates, bandwidth claimed up to 7Mc (MHz). CRT is a K-1119 (possibly made by Dumont). Alt or chopped sweep modes probably made this scope obsolete very quickly.

David

[Andrew_Debbie]

Interesting bit of history.   My uncle Ted worked at the labs from the early 1950s until he retired.  There is a chance he used that 'scope.   Unfortunately my chance to ask him has long passed.

That was written in 1958.      7MHz bandwidth.      All 4 beams use the same time base and trigger.

I imagine the 101A lived in dusty corner after the labs took delivery of their first 555.

The dual beam Tektronix 555 came out in 1959.    30MHz bandwith / quad trace possible with pluggins.    Each beam has a time base and trigger, which is far more flexible then the 101A.

   Of course the sweep of each pair of traces are tied to each beam.

I imagine the 101A lived in dusty corner after the labs took delivery of their first 555.

[Martin.M]

555 are nice in the home, yes.

4 channels each beam are possible by unsing M plugins.
Later, Tek556, it was faster, = 1A4