Johnny,
Thank you. Those are resin grips from the Buffalo Bros. Cowboy Store
http://www.buffalobrothers.net/grips/index.htmI spoke with Lois and told her what I had and that their S&W grips looked like that they might work.
She asked me to send a tracing of my stock grips for her to compare.
She replied that they were very close,so I ordered a pair for each.
I ordered the ivory streaked color and asked her to make them different.
They add the streaking and the cracks themselves.
When they arrived, I followed their fitting directions and they were a snap to fit.
They are very much thinner than the stock wooden grips and I have found that I like the way that they feel and allow me to point much better.
They do a great job on their grips. The antiquing and staining that they do puts the darkness into the checkering.
They offer a 100% satisfaction guarantee on the
unmodified grips that they send you.
As long as you don't alter them, you can send them back.
There is slight casting flaw in mine that is visible at 1:00 on the top radius; but I like it... it adds character.