Olympia sold typewriters in over 140 countries, so when you ordered a typewriter you not only had the option of a large number of specific language keyboards, but a number of specialty keyboards too such as chemical, pharmaceutical, mathematical and even library oriented keysets. On top of that there was a large number of typefaces you could choose from and over a hundred special symbol keys.

The keyboard in the photo looks to be a standard Dutch version that was ordered with four special of those special symbol keys: the male gender, female gender, greater than, and less than characters.

Did you know Olympia also offered a special order character to represent a bisexual person too? That has to be a true rarity. 

To answer your question(s), it's a special order (versus a "custom built") keyboard assembled from off-the-shelf parts. Given all of the ordering options I listed above, it can be argued that every special order keyboard is exotic, particularly when the majority of typewriters sold used standard language keyboards.

@Uwe: Thanks for your comprehensive answer, much appreciated. I used the word 'exotic' in my question because I saw it on an Olympia price list, it was used to describe a keyboard for an SM 9 with a carriage that works the other way around, for Arabic languages I suppose. So I assumed all special keyboards were called 'exotic'. With 'special' I meant other then standard language keyboards.

@skywatcher: the link below is an article about the history of Olympia, it states they experiment with Dvorak keyboards but they were to expensive. 
 

Last edited by Uwe (31-8-2019 21:24:20)

No problem! And a good reason too. Kudos.