Hello everyone, I'm new here and am interested in finding out some information on some old industrial sewing machines I have. I can't seem to find any exactly like them in my searches and was curious what their value might be. Also on the "Columbia" & the "Lewis" I'm not sure what the attachment mounted between the arm and the needle is. I sure would appreciate any help I can get. It looks like I can only attach one pic at a time so I'll start with this one:

Hello, it's me I wasn't able to post any pics because of the size. I'll have to resize and try again later today but for anyone who might have some knowledge of the machines this is what I have:

1-Singer 69-8
2-Wilcox & Gibbs "Metropolitan" (992-112) 36321
3-Union Special 52900 B
4-Singer 95-10 (S/N AD020017) with a "Columbia Blind Stitch Machine Co" mounted attachment
5-Singer 95-100 (S/N AE659090) with a similar mounted attachment from "Lewis Invisible Stitch Co"

Any help would be great.
Thanks,
Walt