Stewart, not sure if this helps, but I do have experience of the company having bought one of the re-edition Spirotechniques, having read David's article on C11.

I found the company to be excellent to deal with and I remain very pleased with the watch. It is of excellent quality and was very appropriately priced. I too have considered a Type20 ( I prefer this variant to the three sub-dial model) and I do find something very interesting in the Auricoste brand. I've never seen one in the wild which, to me, adds to their allure.

Again, not sure this is any help, but having transacted with the company, I would do so again without hesitation.

Good luck!