I seem to remember there were posts with teeth numbers/micrometer dimensions etc on here, can someone post links please? I'll let you all know what I have. From "Moonwatch Only", I think one is not a Speedmaster crown.
Pictures will help. Search naiad crown as there was a pretty good information thread for all speedmaster crowns in one of the threads
My poor photographs will not help, if I can compare what I have with dimensions from a post, it will all become clear.