In the link there is an explanation about where these glasses have originated depending on the mark. There is a lot of research on PK.
Source: Pressglas Korrespondenz 2014-4
It says
'PK 2014-4, SG: It has now been clarified what the numbers “1/4” pressed into the underside of the foot mean: 4 is the catalogue number of the pressed glass in MB Dyatkovo 1903. There are several pressed glasses with corresponding numbers in the Peltonen collection. It is very unlikely that the Fedorovsky brothers used similar or even identical catalogue numbers. The number “1/4” therefore clearly belongs to Dyatkovo 1903! And the monogram “БФ” definitely belongs to the Fedorovsky brothers / Fjodorovsky [Братья Федоровский]!'
I think Maltsov owned Dyatkovo glass btw.
The item in question is shown on Seite 12/16 here in the catalogue:
https://www.pressglas-korrespondenz.de/aktuelles/pdf/pk-2014-4w-sg-dyatkovo-pokal-gruen-1900.pdfCould you send those links back to Mareike? I'm interested to know what PK say mostly because of the colour of your glass and whether the bowl shape matches.
They reference the Launay Hautin because the designs are very similar but it doesn't say those with this foot are Launay Hautin pieces.
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