Iver johnson 32
I have the same on my grips-Nov-17-03. ser-30xx. I have been trying to find out when it was made,No luck. A guy told me that in walla walla county WA. Could tell me. No luck. Maybe they can help you. have a nice day.P.S. Mine is with out the hammer.
there is only one success-to be able to speed your life in your own way.