With a fork, score cucumber lengthwise; cut into thin slices. Place in a bowl; add water and vinegar. Let stand for 30 minutes. Meanwhile, in a small bowl, beat cream cheese, mayonnaise, garlic powder, onion salt and Worcestershire sauce until smooth.
Cut bread into flower shapes with a 2-1/2-in. cookie cutter. Spread each with cream cheese mixture; sprinkle with paprika and top with a cucumber slice.
Remove pimientos from olives; place in center of cucumber. Cut olives into five wedges and arrange around pimiento in a pinwheel pattern. Yield: 3 dozen.