MeisterSinger Watch Salthora Meta. MeisterSinger watches have adopted a new style, paying tribute to the clear, powerful character of this watch concept. The Salthora Meta is 43mm in diameter and has a striking, cylindrical stainless steel case. It is waterproof up to 5 atm and fitted with a six screwed exhibition back. The digits of the minutes and of the hour display are depicted in a sans serif Helvetica typeface.