You can purchase a copy of the Necchi 537L manual as either a PDF download or a printed manual here: https://www.sewingpartsonline.com/instruction-manual-necchi-537-l.aspx? . There are several online guides for threading Necchi machines. These may help. However I don't know how different the leather and lace 537 is from other Necchi machines. The manual will have the threading diagrams.
I hope this helps .
Cindy Wells
Install a brand new needle and make sure it is installed correctly. If it still hits the bobbin case, the machine has probably been knocked out of time. Search for "sewing machine timing" or take it for service.
Probably not much. Necchi machines are very common. Search on eBay and other web sites. It is probably worth more to somebody as a sewing machine than as a collector. They are good, tough machines.
I think it is easy
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