Victorian Condiment bowls

When I got this it was the most expensive piece of glass I had brought (her indoors says I should mention this doesn't mean it cost a fortune just that I have Dutch ancestry). At the time I had a few similar glass bowls only that weren't exactly cheap but then when I thought a bit realized that of course I got two for the money! There you go Dutch blood appeased.
On the bottom the silver tray is stamped S.D&Co EPNS for Stewart Dawson & Co London, not sure if this means they sold the whole thing or just supplied the tray? I have seen similar pieces attributed to Stourbridge.
They are in excellent condition and I just polished the tray with Silvo for the first time and it came up well just the one mark which is being stubborn, don't want to polish it too much I might go through the plating.