Bergeon 4040-P extensible and reversible movement holder made of synthetic material for scratch sensitive watch movements or works with mounted dials. Suitable for calibers from 8 3/4”' to 19” or with a ø of 30 – 48 mm.' Material: synthetic Movement size: 8 3/4 – 19 ”' Diameter: 30 – 48 mm Weight: 15 g