Victorian Vaseline and Cranberry Jam Dishes

Victorian cranberry and vaseline jam dishes made in the last 15 years of the 19th century in England. They would have been put on the table for breakfast - obviously the marmalade and strawberry jam went well with the morning buttered toast and Times newspaper. They are missing their EPNS stands but still pass the eye test despite that. I have been collecting these for years for their color and design. All have polished pontils. I think that they were made by different glass makers in Stourbridge. Could be Stuart, Richardsons, Webb and S & W. Some could be Bohemian. They exported many articles for the British market. The second photo has one with threading - was this exclusively an English technique?