This card was probably a remainder from a large preprinting, perhaps left-over when the business closed or the partnership promotion as seen in the illustrated advertisement on the reverse had ended. The 2-Cent rate was still valid at the time of this cards' redemption.
The notation on the front of the card suggests that this may have been one of 50 similar cards redeemed as a group.
Place mouse on image to see the reverse side of the card.