regret I don't have experience of these pieces, but some information direct from Vigier & Pina ('Smoke & Ice') might be of interest.
Appears Lindstrand was with Kosta from 1950 - 1973, and during early 1950s and 1960s most pieces were marked 'Kosta', with a designer code followed by a secondary code which indicated the type of glass, and a four digit production No. - but not, it seems, the designers name. I'm not sure what type of glass this piece might be described as.
During the early 1970s the signatures and markings changed to include the designers signature, as well as a five digit production No. - it gets quite complex after this with various letters/codes etc., but being earlier your piece should have been simpler, although going by these authors it seems those pieces from the '60's wouldn't have shown a signature, but would probably have included an upper case L for Lindstrand.
Presumably, like many of the Scandi factories, signatures were mostly that of a company employee, as opposed the actual designer, so type of writing not restricted to one worker, and can vary.
In said book it appears that most pieces had a fairly large circular ground/polished pontil depression but not sure I'm seeing this on your glass, and regret I can't match the lettering on your piece with the Lindstrand signature in the book - although that not a conclusive feature remotely. Would agree that signatures on glass appear often not to be cursive, presumably for obvious reasons of difficulty of writing on glass, so your piece unusual in that respect. All of the Kosta signatures I can see show letters created individually.
regret of no help - going back a few years we did have some people with much knowledge of Scandi glass, but they mostly now absent.