This cover was mailed to New Jersey, U.S.A.. It bears a gorgeous block of four of the 4cGR1E, and a horizontal pair of the 2 centavos value. It is likely that these 2 centavos stamps are from the 2c2 issue because of the bright white look of the paper. Here are quick lines to pages for the three major groups: philatelic exhibition covers, covers that are quite likely philatelic, and covers that seem to represent regular use.

Below is a closeup of the 4cGR1E block of four. It is postmarked BUENOS AIRES 23.

Below is a detail of the 2 centavos pair. The cover was postmarked by a machine canceller with a slogan, but the canceller failed to cancel all but one of the stamps.