I don't know that all DHE Repros started with some type of brass-like coloring on the triggers which then faded. Could be . . . the case colors certainly fade! But I can think of at least one other subtle difference in the guns: Some have the "Parker Reproduction" in a cartouche on the rib; on others, it's on the barrel. So I wouldn't rule out the possibility that some triggers started out silver, others gold-ish.