St. Vincent 2252a-h, Disney School of Education Stamps, Sheet of 7 stamps, VF, MNH. Disney sheet of seven (7) stamps, titled "Mickey's Scientists" from the Disney Characters at Work series. Multicolored, full gum. Note that 2252d has been replaced by the Mickey label. The sheets had limited release on Dec. 3, 1996, VF, MNH.