World Wildlife Fund Stamp Collectors / First Day Cover Albums There are three complete binders featuring both stamps and first day cover envelopes in the official binders.  There is also one binder that is about one quarter full.  As well as the stamps there are pages of information about the animals.One binder features an introductory letter from HRH The Duke of Edinburgh - Prince Phillip, who was President Emeritus of WWF International at the time of issue.These binders are in excellent condition, and each comes in its own black slip case.