1898 Pre-Christmas 2c Map use, 3c letter rate.

#75, 85 1¢ Numeral, 2¢ Map tied by Dec 23 1898 Norwood, Ont to Brantford. A scarce pre-Christmas use.

The Christmas stamp was issued before Dec 25, 1898 (earliest use Dec 7), and was used with a 1¢ to pay the 3c letter rate.
This is the world’s first regularly issued postage stamp.