Vase with iridescence and gold leaf inclusions

Heavy handblown vase, with gold leaf inclusions and surface iridescence.

19cm high, 14cm wide

Signed on the base but it looks like someone's taken sandpaper to the surface and almost obliterated the signature. Not sure if it's one word or two, but I think it ends in a date. can't get the whole thing in focus so uploading several pics in the hope someone recognises it.

I think it says Strombergshyttan, but I haven't found any examples with gold/mica inclusions.