Yes, most of the canes are definitely known from the Ysart Brothers (Vasart) period. As yet I do not recall finding a match to the pinkish (or orange) coated cog cane in anything from that same period, but it might be.
However, as I have often said on the Board, dating items from the Ysart Brothers (Vasart), Vasart Ltd (1956-1964) or Strathearn (1964-1980) periods is not at all easy when looking at canes alone. Lots of items from each of those periods can be found with early canes. And some of the early canes may even date back as far as the 1930s!!
The features of this dish suggest to me that it is either Vasart Ltd or Strathearn and very unlikely to be pre-1956.
I made an error with two broadly similar dishes selected for the PCC Ysart exhibition and Catalogue. When the details were almost finalized, I suddenly realized that I had grouped dishes like this one into the earlier period. A mad dash to check with the UV light confirmed that they fluoresced Blue under shortwave (lead-based glass therefore 1956 or later) and I was at least able to get a correction included in the catalogue wording. I am sure the other folk involved in the event recall my panic and embarrassment quite well.