Bit of an oddity - I've a perfume bottle (awaiting new fittings) that I know for sure is SVdA, having seen several labelled examples in the exact same size, shape, finish and colour, but mine has a somewhat rubbed paper label that says:
Goodfriend (I think)
Italy
Hand Made
Have searched, but I can't find any company or trademark of that name that's related to Seguso specifically or glass importing generally.
Any clues?