Thanks Enigma.
I have suspected for a long time the fixed bale may be a Schlueter, but there is no S, and no Heat stamp apparent,and without really stripping the paint right out of the inside ,I guess I will never know?
The other lid has a heat stamp of 34?C, with makes this one quite early I suspect. I did find out a while back that because there is a dimple,where the swivel bale is now,it was once a Fixed bale,and converted to this way !!!
I have a few more F/S lids ,so when I get time I will post them up for you to have a look at,if you want.
Thanks again