Just got it a month ago, and it is his latest "most updated" version. It just stopped ticking and it is a mystery. I am very careful with it, and it was not wound too tightly or anything. I emailed the dealer, Davidsen, and he insisted I send it back to him for repair/replacement which is all anyone could hope to ask for in this situation.
Update.....Hours later, I wound it backwards and it began ticking again, stopped again and the same trick worked once more. Will send it back though as this seems out of the ordinairy. It is not a 6497-1 movment either.