细节
Holtzapffel measuring tools:
a pair of 9-inch dancing master calipers, a pair of 5½-inch plain calipers, two pairs of 5-inch divider/calipers, one with broad jaws, a protractor setting gauge, a square setting gauge and a steel try-square for setting chucks vertical, in steel and lacquered brass, all signed Holtzapffel (7)
a pair of 9-inch dancing master calipers, a pair of 5½-inch plain calipers, two pairs of 5-inch divider/calipers, one with broad jaws, a protractor setting gauge, a square setting gauge and a steel try-square for setting chucks vertical, in steel and lacquered brass, all signed Holtzapffel (7)