Welcome to TFF.
Your pics don't show, but when I copy and paste the url they do: http://leopold33.tumblr.com
It's a large frame hammer third model made in 1931, with the optional "Perfect" hard rubber target grips.
Are you sure it's a 6-shot? It might be the angle of the pic, but looks like a 5-shot cylinder.
A 6-shot would be .32 S&W Long caliber, a 5-shot .38 S&W caliber.