Bergeon Extensible and Reversible Synthetic Watch Movement Holder

For calibres 8 3/4''' to 19'''. Tightening on ∅ external from 30 to 48 mm. Bergeron's swiss made movement holder is reversable and wil fit a wide range of watch movement size allowing you to hold from 20 mm (8 ¾ ligne) to 43 mm (19 ligne) in size. The 4040-P is the synthetic/plastic version of the Bergeon 4040. The synthetic material used in this holder is non-marring and wil not scrath your work.