Yes, there are a couple of pages in Hajdamach - including a couple of pictures of his machines. Just from these pictures, I can't understand how they work (especisally the template machine has us baffled - apparently a person traces he pattern, so what does the machine do?)
I have also been in contact with the Science museum, but that is a lengthy process... and has (so far) not resulted in anything concrete.
... which is why I was wondering about the Northwood book, maybe he describes the machines in it? - so, Sue, I look forward to your potential finds! I am not averse to buy expensive books, but what if it mainly deals with his famous carvings?
- maybe I should also say: as etching, as far as we have found, was never used for "art" pieces here in Sweden (Ann Wärff experimented some, but that is all we have found). So our interest is mainly in the "machine" area: when, who, where were the machines developped? Which came first: the pantograph or the guilloché machine? How many manufacturers were there, by the end of the 1800s, and where?
and so on...
Kerstin