Originally Posted by
PatriceJ
Thank you for that link but I have another question, I have a new elna 720 with a top loader bobbin holder would I need the size L or Class 15, I think it may be the latter.
The other thing I would like to know does any machines have problems with pre wound bobbins? The reason that I ask is that a UK site says some manufacturers don't recommend them, but doesn't quote which ones, duh!