Using a fine saw, he was removing a small metal sample from a first - century - B.C.E. iron helmet that had lain on the bed of the Rhine River for at least 1,500 years.
Ta kõrvaldas terava saega metallitükikese esimesest sajandist e.m.a pärit raudkiivrist, mis oli lebanud Reini jõe põhjas vähemalt 1500 aastat.