Well it's certainly an AS movement, look up the ranfitt site, my guess is 1885/86 but many of the AS auto movements have that automatic reversing bridge set up. However the calibre number is always written under the balance wheel on these and you can see some text in your photo.
Thanks! That was my initial thought but I started second guessing myself. Now to figure out if it’s going on a Bulang and Sons beads of rice or go with Forstner. Not fond of the cheap black strap that’s on it.