Randy; I did try and look under the rib for numbers with a bright light but could not see anything there. I do not have a mirror small enough to get in there.
And the trigger does appear to have 1170 stamped over a previous three numbers, but it is hard to tell for certain. This one works perfectly so I did not remove it when The gun was apart to work on the wood. I have heard that if your single trigger works do not mess with it
