I recognize the breast star of the Order of the Garter. The other one must be the breast star of a Knight Grand Cross in the Order of Orange-Nassau, seeing the corresponding riband.
Strangely enough the Prince of Wales wore a "lower" Order in Amsterdam: Prince Charles opted for the riband and the breast star of the House Order of Orange (exactly the same as the Princess of Wales in 1982) while he has a higher Order, worn in 1982 (State Visit) and in 2002 (Wedding Willem-Alexander).