Hi all,
I've recently acquired a Stanley #78 mostly intact for a good price, and while I do have both the depth stop and fence, the depth stop is without it's screw.
I'm led to believe that there are two different screws depending on the plane's age, however I've had little luck finding information on dating the #78. I assume mine is the later type though, it is marked as made in Canada, and has the Stanley Sweetheart logo on the iron.
Cheers,
Sean