Quote Originally Posted by Strela167 View Post
https://sizes.com/tools/thread_progress.htm

http://www.watchrepairtalk.com/topic...ead-die-plate/

http://www.homageforum.com/viewtopic.php?f=6&t=1824

http://www.chiark.greenend.org.uk/~alanb/martin.html

https://www.cousinsuk.com/

Clear as mud. Guessing knock off a digit so 7 = 0.7mm , going by Cousins' crown listing
yeah as you say clear as mud think will just order both sizes then I will at least for the future know what I need for these type of conversions