Hi Chris,
Sometimes there is only a label, sometimes a label and a signature
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You can for instance see a listing on eBay:
label: FM Konstglas Ronneby Sweden
signed: FM Ronneby Sweden
From this people use different name combinations in their listings:
FM, FM Konstglas, FM Ronneby, Ronneby, Marcolin Sweden,
Fare Marcolin, Faro Marcolin, Farao Marcolin
Sometimes Ronneby Sweden, and once Ronne by Swegin :24:
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FM stands for Färe Marcolin, F does not stand for Fare or Faro.
Josef Marcolin was married to Inga-Lill Färe.
Josef and Benito Marcolin had their own glassworks in Ronneby, Sweden, 1961-1991.
The name of the company was FM Konstglas.
In 1983 they changed the trade name to Marcolin Art Crystal (with the FM logo),
the company name was still FM Konstglas.
In approx. 1988-1989 they changed the company name to Marcolin Art Crystal,
with trade name Marcolin Art Crystal (now without the FM logo).
In 1991 Josef and Benito moved production to Sardinia, Italy.
The company closed down in Ronneby in 1991 and the Marcolin brothers went back
to Italy to work with Sardinia Crystal. The idea was to continue production of
the existing range of products but the collaboration did not work out.
Benito moved back to Sweden and Josef to Austria.
I do not have much details about this collaboration but Sardinia Crystal
retained some rights to both the name Marcolin and some of the design for a
number of years. Possibly from 1994-2004.
When referring to Marcolin/Sardinia Crystal, it’s better to use Marcolin Sardinia, to avoid confusion.
1994-2001 Benito worked for Vas Vitreum, Vadstena, Sweden.
http://www.vasvitreum.se/ Josef (after Sardinia Crystal) has collaborated with Waterford Crystal, Dartington Crystal (1997-1999) and also Colle Vilca (Italy).
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By the way, it’s Konstglas and not Konstglass.
The Swedish word “glass†means ice cream, so it's the Swedish word "glas" which means glass.
Hope this helps! If not, please let me know if you have any further questions.