I found this article online which seems to confirm that the original was an ELU design.
http://www.woodworkersinstitute.com/woodworking-crafts/kit-tools/ancillary-equipment/superjaws-xxl/
and Ben Law agrees with me.
https://books.google.co.uk/books?id...ChDoAQhOMAc#v=onepage&q=ELU superjaws&f=false
QED?
http://www.woodworkersinstitute.com/woodworking-crafts/kit-tools/ancillary-equipment/superjaws-xxl/
and Ben Law agrees with me.
https://books.google.co.uk/books?id...ChDoAQhOMAc#v=onepage&q=ELU superjaws&f=false
QED?