To celebrate Switzerland’s National Day, SWISS is offering a 10% discount on 1400 travel vouchers until August 2 (Noon / Zurich Time).   Vouchers are available only in 100CHF and 200CHF (Swiss Franc) denominations and can be applied to ANY SWISS flight as long as it departs from a Swiss airport.

Only one voucher can be applied per booking but there does not seem to be a cap on the amount of vouchers you can purchase.

The voucher must be used for travel that takes place between July 31, 2013 and July 31, 2014.