Precision, stable work-holder for all engraving. The fully adjustable pivot drag with radial and thrust needle bearings that use the entire mass of the block to absorb any shock and force. Heat-treated, blued jaws, and two adapter plates, (one fixed and one pivot), to take standard engraving block attachments. The ball and crown are hard chrome plated. Furnished with rubber holding ring and attachments.
Big Book Catalog, Issue:66, Page:412
SPECS: Steel. Weighs 28½ lbs. (12.9kg) Spherical diameter 5¾" (14.6cm), height 7¼" (18.4cm). Jaws - 3" (7.6cm) wide, 1¾" (4.4cm) high, 3½" (9cm) opening.