Genuine Stamps are always Perf 14x13½. "Stamps" with Perf 13½x14 are always counterfeits.
1c-1F Navigation and Commerce
1c-5F Leopold, Woman, Coconut Grove
These stamps exist in two types:
The end of the Left Tusk extends behind the Right Tusk
The end of the Left Tusk stops behind the Right Tusk
5F Coconut Grove, Ocher (Mustard shade) and gray with Certificate