Hi Guys.
Smiths book is American,was published in 1990, and uses imperial units, which is fine by me. He uses American threads and I do not possess the necessary taps and dies so I plumped for the English BA threads. I found a useful table on the internet entitled "BA Thread Substitutes", which details BA, American, and Metric sizes.
The clock design specifies rear winding, bearing in mind the weight of the clock, and the delicacy of the escapement, options for modifications to convert to front winding are being considered.
It was raining yesterday, so I decided to make a start on the plates. The book includes a full size drawing of the plates so I took a full size photocopy. It suggests that this be glued to the brass plate using 3M Scoth brand Spray Mount. I did did not have any to hand , so I used strong wallpaper paste. When dry I securely clamped down the plate and set about cutting the two separate plates ( the back is different from the front). A Jig Saw was used to complete this task. Cheers David