master 38In Master work centers, the operators is protected through doors that grant: Hh degree of safety; Isolation of machine’s moving parts; A clean work environment (water and production scrapsSeamaster Aqua Terra 150M 41 mm, Sedna™ gold on Sedna™ gold. Co‑Axial Master Chronometer Small Seconds 41 mm. 9 ; Seamaster Aqua Terra 150M 38 mm, steel on steel.