I had a 12-36 displayed on my E-TRAC yesterday and since a zinc penny gives a reading of 12-37, I figured I was going to dig another zinc penny. I was glad I dug this signal because it turned out to be a Sterling bracelet. The bracelet was laying flat which explains the low conductivity reading, I positioned the bracelet vertically on the ground and it gave a reading of 12-44 or 12-45 so always dig those conductive reading in the 30s. It weighed in at 1 3/8 ounces!