Redfield 70 sight for 1886 Winchester|Winchester Rifles|Forum|Winchester Collector

Can anyone post a few pictures of a Redfield #70 receiver sight base that is correct for the 1886 and m71 ? I am looking at one that has the F marking but not the FH thqt I expect from looking at a fit chart . It also is not totally flat on the back like a ’94 or’92 sight and has a beveled ridge at the top like some shotgun and Remington 14 and 141 sights have. Any help is appreciated , Thanks.