 For appraisal and testing of gold. Wood case contains three acid bottles with ground glass stoppers and applicators, test stone, and a set of five gold testing needles for 8, 10, 12, 14, and 18 karat gold. Acid must be purchased locally. $122.10 |  For appraisal and testing of gold, silver, platinum, brass, nickel and German silver. Wood case contains three acid bottles with ground glass stoppers and applicators, test stone, set of gold testing needlesset of gold testing needles for 4, 6, 8, 10, 12, 14, 16, 18, and 20 karat gold. Acid must be purchased locally. $177.71 |
 Used to determine karat content of gold. Needles and item to be tested are rubbed on test stone and treated with acid to determine match. Set consists of nine needles for 4, 6, 8, 10, 12, 14, 16, 18, and 20 karat gold. $149.71 |  Needles and item to be tested are rubbed on test stones and treated with acid to determine match. Set of four needles for 10, 14 and 18 karat gold plus silver. $71.94 |
 Used to determine karat content of gold. Needles and item to be tested are rubbed on test stone and treated with acid to determine match. Set consists of five needles for 8, 10, 12, 14, and 18 karat gold. $89.52 |  A dark stone on which needle and item to be tested are rubbed. Use with test acid solutions. Stone measures 1-7/8" x 1-1/2" x 1/4" (48 x 38 x 6 mm). $28.73 |
 Test stone only. $10.66 |  Six to 18 karat range, state of the art electronic gold testing technology from Tri-Electronics. Technological breakthrough that allows for the measurement of low to high karat gold products, assuring the buyer of gold content in the most critical gold alloys. Measures 12" x 10" x 3". UL listed. Three year warranty. Also operates using two 9 volt batteries (not included). $620.00 |
 Six to 24 karat range, state of the art electronic gold testing technology from Tri-Electronics. Technological breakthrough that allows for the measurement of low to high karat gold products, assuring the buyer of gold content in the most critical gold alloys. Measures 12" x 10" x 3". UL listed. Three year warranty. Also operates using two 9 volt batteries (not included). $650.00 |  For use with model 56762 $36.84 |
 For use with model 56763 $36.84 |  For use with models 56762 and 56763. $32.32 |
 The most accurate, low-cost tester available, backed by dependable service and built by Tri-Electronics, the inventor of electronic gold testers. Measures white, yellow, pink and green gold in a full range of values from 6 to 18 karat. No dangerous chemicals or mixing of fluids, so it's ecologically safe. Measures 12" x 9" x 1-3/4" (305 x 229 x 44 mm). UL listed. Three year warranty. Also operates using two 9 volt batteries (not included). $403.49 |  Adapter for model 56762. $43.08 |
 Accurately measures white, yellow, pink and green gold, along with platinum, in a full range to 24 karat. Accurate to the nearest karat in the 6 to 18 karat range, plus 20, 22 and 24 karat readings. Ecologically safe with no dangerous acids or messy, harmful chemicals. Measures 12" x 9" x 1-3/4" (305 x 229 x 44 mm). UL listed. Three year warranty. Also operates using two 9 volt batteries (not included). 110 Volt. $499.70 |  For models 56762, 56763, 56782,. $21.98 |
 $78.51 |  Box only. $29.42 |
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