. 20th century catalogue of supplies for watchmakers, jewelers and kindred trades. No. 34. B. S. O. Offset Guard, Open Post, per dozen, $ With Pcx. Lenses, add $ per do. No. 30. B. .S. O. Offset Guard, per dozen, $ With Icx. Lenses, add $ per ch

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Keywords: ., bookcentury1800, bookdecade1890, bookid20thcenturyc, bookyear1899