hope you manage to upload some pix. Designers at Kosta/Kosta Boda, post 1950, which will probably cover the date of your piece have been ...
Vicke Lindstrand (1950 - 73) first letter of code is L
Ernest Gordon (1953 - 55)
Mona Morales-Schildt (1958 - 70) code is usually SS
Anne Warff (1964 - 78)
Goran Warff (1964 -
Stig Lindberg (1965 -
With much Scandi glass, the 'signature' on the glass is often not that of the actual designer, but mostly a factory employee signing on behalf of the designer. The above might help you to decide to which of these your signature relates.
Welcome to the GMB.
Ref. 'Scandinavian Glass 1930 - 2000 ... Smoke & Ice' - Lorenzo Vigier & Leslie Pina - 2002.