Hi, I work for a sailmaker who has a singer 457 A105M which is a great little workhorse. I am looking to purchase something similar as I am having continuos timing problems with my Pfaff 138. I have found singer 457s with different sub headings of A, G or U, such as singer 456 A 505G-L.
My problem is that I can't find an explanation for these headings.
Can anyone help?
Many thanks!