The Hypergon is one of those "legendary" lenses which are relatively much more expensive today than when they were new - almost a century ago. In terms of "real money" - average worker hourly pay, or something, the price is about the same now... The fully equipped 60mm cost 120 Mark in 1910, which was a considerable sum.
They were made in 60mm, 75mm, 90mm, 120mm, 150mm and 200mm focal lengths. Two versions were available: with or without the "star shutter". This was a rotating star-shaped aperture thingy which when used for part of the exposure worked as a center grad - to combat the light falloff towards the corners.
Without the starshutter, the lens gave good results over a 110° field of coverage; with the starshutter in use this was extended to 135°. that mens that the 60mm was designed to cover a 300mm field - or 8x10" film size.
Since the lens is completely symmetrical, there is no geometric distortion. The construction is fairly simple with only two deeply curved elements, so resolution won't be as good as more complex modern lenses. But no modern lens has a 135° coverage, so there isn't really any alternative if that's what you need.
Without the star aperture the coverage is similar to that of the Zeiss Protar f:18 wiedeangle of the same time. In 1910 the price of this was half of that of the Hypergon, today the difference is a factor of ten. And they're sharper.