Re. Your cocking piece site, look at our 'Classic' Firearms Photos & Archive - Post by " kuduae " Cocking-piece aperture sights. Your base looks like a Parker Hale Sportarget.
http://i1018.photobucket.com/albums/af303/kuduae/2010_01180014.jpg

Your rear site is from a Brno ZKW465 22 Hornet