For your consideration I have found in an estate 3- 14 karat gold charms and one matching pin. One charm reads Telephone Pioneers of America #21 B.T.Co. 2nd charms reads the same with the number #25. The third charm has no number only 3 stars and reads Bell System B.T. Co. The pin has two stars Bell System and B.T.Co.
All pieces are stamped 14K. All 4 pieces are in excellent condition. weight: 8.0 grams. They measure about 5/8" not including the hooks. Pin is Approximately 1/2". Bell Telephone close in 1984.
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Vintage & Antique Collectibles Jewelry, Gold and Sterling