Thank you Sarg, exellent , I can see the diferences between the 2 models ( yours with 1 spring an GKs with 2 ) I also realize that it is way out of my skills to reproduce such a piece o machined steel, ( I know, Tilleyman told me so ), any way Ill keep allert if such a rear sight appears for sale some place.

Thank you again.

Best regards.

Ernesto.