Question: If the country of Origin is South Africa, who is the primary user?
SQL: SELECT "primary user" FROM "1-26389588-1" WHERE "Country of origin" = 'South Africa';

Question: If the Country of Origin is Denmark and the year of introduction is 1962, what is the primary cartridge?
SQL: SELECT "Primary cartridge" FROM "1-26389588-1" WHERE "Year of introduction" = '1962' AND "Country of origin" = 'Denmark';

Question: How many different years was the name/designation CETME?
SQL: SELECT COUNT("Year of introduction") FROM "1-26389588-1" WHERE "Name / designation" = 'CETME';

Question: If the country of origin is Switzerland, what is the name/ designation?
SQL: SELECT "Name / designation" FROM "1-26389588-1" WHERE "Country of origin" = 'Switzerland';