Table:
text: Shooting thaler
20th- and 21st-century Swiss Confederation issues
Later thalers with event location and year, showing denomination, metal, number struck and Standard Catalog of World Coins reference number
Location_ Date_ Denomination Coinage_metal Mintage KM_number
Solothurn 2006 00050 50 francs Silver 2000 S71
Solothurn 2006 00500 500 francs Gold 200 S72
Lucerne 2007 00050 50 francs Silver 2000 S73
Lucerne 2007 00500 500 francs Gold 200 S74
Geneva 2008 00050 50 francs Silver 1500 S75
Geneva 2008 00500 500 francs Gold 150 S76
Obwalden 2009 00050 50 francs Silver 1500 S77
Obwalden 2009 00500 500 francs Gold 175 S78
Aarau 2010 00050 50 francs Silver 2000 S79

Question: What is the coin metal for a KM number of S75 under Schützentaler?