A smaller blue one to add. Intricately engraved vines and grapes in three separate panels.
Smaller than the others but I bought it for the engraving and the label (some have engraved flowers on that are in a sort of thirties style engraving of roses and I don't like that style. This is more flowing,less stylised and I prefer it.)
This also has an intact label in Russian on the base. I think the style of engraving and the label are the same as that on the red one although the label is a different colour.
I've not yet worked out where these are from. There are two other Russian labeled types that I've found however the engraving on the eggs is not in style I like and I think they are from different workshops (Magrav? and CO? although am no closer to finding out where those types are made).
I think this one is 'vintage' as is the red one. The gilding is worn and they feel a bit older rather than made in the last few years (although that is a subjective/instinctive judgement,not made through any particular knowledge).
There is another one here with the same label (although would definitely question the seller's dates of 1920s, as pretty sure they are much later than that).
https://www.etsy.com/listing/202079981/imperial-russian-cobalt-blue-glass-eggThose with this Russian label all have a particular style - it's different to other eggs with the other labels - hard to explain but when you've looked at a few it's easier to 'group' them by the way the engraving is executed and the style of design oddly (although at a first glance they might all look to have similarities). There are not that many with this label on the base and it's taken me a while to find one I liked that also had the complete label.