Another unusual one. This is a Grover & Baker double chainstitch machine. No shuttle or bobbin!! It uses a spool of thread on top and one below (the lower spool is held on a bar in the cabinet) It uses a curved needle on top and a spiral "needle" on the bottom (really more of a corkscrew shuttle)
Underside
[ATTACH=CONFIG]530963[/ATTACH]
Topside
[ATTACH=CONFIG]530964[/ATTACH]