I imagined it was a Williams of some sort - there is no branding, and it is very low profile, with a tiny dioptre hole.
Agreed, the 127 is not that great itself, just that my 335 has been adjusted so that there is no discernible difference between stages 1 and 2, and the let off is a surprise. Have not had chance to sort it out yet.
Of course, neither is a patch on my 300S.