Hi, just a couple of observations that probably won’t be useful, feel free to ignore them all
The cross strike of the F doesn’t look to be the same style as the rest of the lettering - it is quite angular, looking like a lightning strike, the other parts of the lettering are flowing curves.
Might the cross hatched areas represent windows, which can have symbolic meaning that might be relevant to a love story. The hatched areas look a bit ugly to me so maybe they are there to convey meaning rather than for asthetics?
Are the birds love birds, or stylised love birds. Like these ones that have crests
https://www.xupes.com/art/product-details/8102/antique-glass-marriage-carafe-engraved-with-love-birds-19th-c/antique-glass-marriage-carafe-engraved-with-love-birds-19th-c.html?If this were a high end item for a wealthy recipient, doesn’t the engraving look reasonably crude due to the workmanship rather than the tools used? For example, in the curved tail of the M and F you can see where it looks like the curve has been produced by a series of straight cuts at different angles. If this had done by a more skilled hand wouldn’t they have rotated the piece against the wheel at varied pressure to create a nice curve. Maybe it looks a bit crude as it is actually very small, but how would it compare to the skill in Bohemian engraving of horsemen and such.
I know nothing of eggs and wouldn’t want to try to teach anyone to how to suck them