Hey indiuckian
This could be the gun you have!

These were made from 1990-1993. Product code #103764 and the 3" guns came with smooth Morado wood service grips(as pictured). The "Airweight" marked guns that ronnie gore has was product code #103795 made in 1994.

I have posted this pic before but it shows a couple more 3" Centennials they made. My 3" 640 has banana grips on it for my fat hands!
jcelect