Literature on the Ultra-Quartz is very scarce, so I've never seen a Longines Sales Brochure than might highlight the various Ultra-Quartz models. Having said, after researching various Internet sources, there seems to be only two case styles: one is a square style while the other is a traditional shape for a round faced dial. The round one appears to be available in either a heavy gold plate or stainless steel; I've only ever seen the square example in a gold plate case.

The dial colours vary on the round cases: the stainless steel one has a dark blue dial while the gold case has a gold coloured dial (see below). The gold square case example always seems to have a white faced dial (see below).

Below are photographs of my two examples of these styles. Only the round dialled one is working. All Ultra-Quartz watches are backset.

Some more detailed photographs of the round dialled example:

Some more detailed photographs of the square dialled example: