Guyana 2919a-i, Disney Mickey's Medical Group, Sheet of 8 stamps, VF, MNH. Disney sheet of eight (8) stamps, titled "Mickey's Medical Group" from the Disney Characters at Work series. Multicolor, full gum, perf: 131/2x14. Note that 2919g has been replaced by the Mickey label. The sheet had limited release on Nov. 20, 1996, VF, MNH.