Thanks guys, I would be surprised if the vase was designed/conceived in 1927, then again, there was plenty of remarkably 'modern' design taking place in the 20s and 30s that still looks contemporary today (especially in architecture and furniture), so why not? I think Lindstrand may still have been a student in 1927, certainly a young man and probably full of design ideas.
I am not sure if I have the perseverance to contact the factory etc, sometimes mysteries can have their own magic. I have been speculating on what the code might mean. The /27 could refer to a good lunch that Lindstrand ate that day or the number of people who he greeted on the way to work, admittedly more than unlikely but still fun for me.
The part of me that likes to categorize and order would still like an answer though, perhaps that will overcome my laziness at a later date.
Thanks again, John.