DWM Commerical breechblock question

[G.T.]

Try to determine if it was made that way..or dented in from flat... if the latter, I would remove the extractor, and with the breechblock set flat on it's face over a brass plate, take an old firing pin, and use it as a punch form to drive the depression back to flat from the backside??..... Maybe not the best, but it's what I would try...Best to all, til...lat'r....GT....