North Dakota Harmonica Reed Plate Signal Guide
Harmonica Reed Plate is a realistic North Dakota detector target tied to old townsites, county fairgrounds, and farmstead yards. Rather than pretending every state has the same history, this profile frames the signal around the kinds of sites that actually produce it in North Dakota: beaches, town greens, camps, farmsteads, transport corridors, or old recreation grounds.
Signal Pattern
flat brass signal with sharp repeatability
Typical Depth
2-5 inches
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