Gehmann #PH999 Rearsight adaptor For Parker Hale or Redfield

This adpator will allow you to use any regular Gehmann or most european rear sight iris to fit your Parker Hale.
Most recent european brand like Anschutz, Feinwerkbau, MEC, Centra, Walther and Steyr

Simple screw-in adaptor

Standard Diopter thread is M9.5 x 1.0
Parker Hale Thread is 7/32“x40Gg BS  (55 degree flankangle)