'64 Colt National Match

I recently acquired a 1964 model Colt National Match 45 auto. It is in excellent shooter grade condition. In my reference book I noticed in 1965 Colt started putting the Elliason sites on the NM models. It did not have a good pic of the the adj site on the pre-64 models. I am pretty sure the adj site on mine was added sometime in the previous 47 yrs. does anyone have a pic of a Colt National Match 45 that shows the Pre-Elliason adj site? Thank You krw

they look pretty much the same, but some are marked "Elliason,' some are 'Accro' and some are NOT marked at all............my 1967 is an 'Elliason'