Those don't have to be off-limits because you're dating someone with a visual impairment. Lots of movie theaters are equipped with audio. I've lived with vision loss my entire life because of a stroke I had If you make friends with a visually impaired person or choose to date one.
They were called "contra" as the mercury level, due to design, decreased in height with an increase in air pressure, hence the name "contra".
These contra barometers are indeed rare, and their elaborate wood case and multiple tubes are considered by many to be the most beautiful of all. The most collectible barometer is the angle barometer, which uses an angled glass tube, filled with mercury, which by design allows the mercury to show greater increases or decreases in pressure.
Another variation of the angle barometer was called a ZigZag barometer, which uses a similar principal as an angle barometer, but has multiple twists in the tube, which resulted in compacting the bulky design of a large angle barometer.