Those Maillard hubs look a little younger and there's something not right about the spacers..........I wonder if they are 70's and someone has spaced them out to fit a later 130mm OLD frame......
I'd gently screw on your freewheel and try it in you frame and check the distance between the small sprocket and the chainstay ........I guess there will be enough space to file 2-4 mm off that large spacer.
Many thanks for your reply shaun. Always excellent advice
In comparison with the Maillards on my Dawes Galaxy (Which also has a rear dropout spacing of 126) the slot detail below the spoke holes is defiantly different. There are more of them & they are smaller on these ones than there is on the Galaxy ones, so you're probably right in thinking these are 70's hubs, as the Galaxy is an '84 I think.
I think I might try them in the frame at 130, like Rob said, then make a smaller spacer to reduce down to 126 & see where the freewheel ends up!
Huge thanks again,