Over the years I've looked at several Parkers with tarnished silver crest plates but when I look at the triggers there is no sign of tarnishing not even on the backside. The worn triggers I have examined display the plating peeling off like nickel does while silver tends to wear away like gold plate or a painted surface on an automobile. I think that Parker plated the triggers of appropriate grades with nickel, not to save money but because it is much more durable than silver. HO train transformers make a very good power source because they have a very fine adjustment throughout the power range for plating.
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