Scott Catalogue lists a double watermark variety of the 2c value of which, a double impression error, unlisted by this catalogue but cited by Schindler. It exists imperforated stamps but it is possible that they are cut squares from copies of the Ministerial Decree deluxe proof.

Excellent counterfeits exist of both values. Mr. Luiz A. Guzman has studied the differences between this stamps: genuine and forged stamps. Below the details:

Genuine stamps

1. The A of Republica and the first A of ARGENTINA are joined at the bottom.

2. The right part of the N of ARGENTINA is shorter.

3. The second N and the second A of ARGENTINA are joined at the bottom on the two centavos stamp only.

4. R and E of 12 OCTUBRE 1892 are joined at the bottom.

5. The three horizontal lines at the left of centavos are one at the left but have three points at the right.

6. The upper part of the T of CENTAVOS ends in two triangles.

7. The flag cross has three arms.

8. Topmast is bent to the left.

9. Ship's helm is straight and long.

10. There are seven birds flying between the first and second ships.

1. The A of Republica and the first A of ARGENTINA are separated at the bottom.

2. The right part of the N of ARGENTINA is normal.

3. The second N and the second A of ARGENTINA are separated at the bottom on the two centavos stamp only.

4. R and E of 12 OCTUBRE 1892 are NOT joined at the bottom.

5. The three horizontal lines at the left of centavos, only the top one has points and lacks the vertical line on the left on the two centavos only.

6. The T of CENTAVOS at top is not complete.

7. The flag's cross has three arms.

8. Topmast at right is wide.

9. Ship's helm is short and narrow at the end.

10. There are six birds flying between the first and second ships, the five centavos has five birds.

• Guzman, Luiz A. "Commemoration of the Fourth Centenary of the Discovery of America in stamps issued by Argentina". Discovery no.30 (April'1990).