The Tektronix 204 is a tilt-lock scope cart for wide (4-bay) 7000-series scopes.
It has a compartment for storing up to five single-width 7000-series plug-ins,
and a drawer for probes.
When it was introduced in the 1961 catalog, the 204 was a 202 with plug-in holder.
Tilt-lock feature on 200-series carts
Tektronix 204-2 drawing
Tektronix 204 Option 2 drawing