I would have thought 96 as that what I thought I saw under the hair spring looked like 96 then in a cloud with either fhf or eta ? :)
http://www.vintagewatchstraps.com/ma...cs/FHFlogo.jpg or http://www.intlwatchleague.com/image...BJRU5ErkJggg==http://www.allwatchparts.com/thumbna...axx=300&maxy=0
be interesting to see a close up of the hair spring :)