Hay bananaman, do you know any details on your trigger? I have one just like it on my 28-2. Thanks
SEMPER PARATUS
I have taken many a trigger out of a S&W revolver, ground off the serrations and then contoured it like the trigger on the OP's M19. I would secure the trigger in a vise, remove the grooves and then used emory cloth to polish it. Do it like a bootblack would polishing your shoes.