The more that I look at your photos the more intrigued I get! Its not like any style I've seen on Stratford before - I wonder if they dusted off some patterns they already had, then designed new ones a little later - it would have been an old fashioned pattern even in 1921 - but I agree with your instinct that its much later than that.
Meanwhile, down in New Zealand, we just had our local Bottle and Collectors Show in the weekend - its the first time in quite a while that I've pulled all my Stuart out of storage, there was a lot more than I expected so I decided to only use one example of every shape (if I had more than one) and for the display I used a piece of black velvet under the colourless glass, and white vinyl under the colours - I was really happy with the result, and people who were familiar with Stuart were saying they had no idea that such a range existed
Anne, when I was looking at the small posy vases I discovered that some were amber and some were peach! I always thought they were all amber, it wasn't until I studied them more closely that I could see the difference -