Below are selected Buenos Aires 32 images. Here is a link to the main Buenos Aires Numeral Postmarks page. Below is a 5c1Et specimen with the earlier version of this postmark. The later version, shown below, is fairly common.

Note that in the three specimens shown below, the edge of the postmark does not show above the RES of AIRES. Shown on top row left is a gorgoeus 5c1Et block of four. Shown on top row right is a 20c "Large Cow," most likely a 20cLCNGR, from the 1947 date. In the bottom row is sharp vertical strip of four of the 5c1CLt.