Välkommen Claus! "L" is just a name for a kind of bobbin the way Miriam used the word. But that is a name for an industrial bobbin so it would be good to make sure there is an industrial bobbin case to go with it. The description of
this L sized bobbin case says that it has an L-shaped thread guide instead of a "pigtail" thread guide. That part that sticks up and out from the bobbin case is what they are calling a pigtail. But
here and
here are L sized bobbin cases that have the pigtails, the part that sticks up, the part that is shown in the Anker manual illustration. Simanco 15277 is supposed to use Class 15 sized bobbins. On Stitchers' Guild there is a
thread about someone else who bought an Anker RZ. And I am very sorry there are not enough line breaks between the paragraphs. I cannot get the board software to let me put them into this post.
