Silva Polaris 177: Valuing accuracyExcellent value, superior accuracy with the Silva Polaris 177. Large numerals at every 20 degree mark and a clear base plate with inch and millimeter markings and a 1:24,000 scale make it easy to read a map, set bearings and plan a trip with the Silva Polaris 177.Features 2 degree dial graduations on the Silva Polaris Declination scale for quick adjustments of map bearings to field headings
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