Hey Elizabeth/Bernadette:) Did you go to a Janome website and look for it? I have a Brother so I'm no help. Did it come with a manual/instructions? It might have it in there. Here are a few websites that might help. Blessings. Terre

I had trouble with the bobbin thread on my MC11000 UNTIL I realised the bobbin is deeper than those of my brother machine. Now ALL my newly purchased Janome bobbins have been marked with a red J. I also keep them in a separate storage box. I've checked my Janome bobbins and there are no marking on them at all (except my red J of course). I live in the UK, maybe the bobbins I can get here are different from elsewhere in the world, but I doubt it.

Hope this helps.

Janome 627569405 Replacement Bobbin Case for Memory Craft MC200E, 300E, 9500, 9700, Elna, Sears, & Deco Sewing Embroidery Machines w/o Thread Trimmers= available at allbrands.com-I think it was about $50

All the Janome parts are the same for all machines, that's a plus I think. I have an MC8000, 1001 and 11K and they are all the same. Even the cheaper machines use the same feet, bobbins, bobbin cases etc.

I looked on my bobbin case and it doesn't have a number on it. I'm lucky, if I needed something for my machine I can call my dealer and say Hey Joe, Help.Is it possible to contact the dealer where you purchased the machines? Carol