next steps for the groups

9. The 1939/41 clay paper issues for the 5c and 10c Brown. Is there a 1c for this one?
10. The 'Servicio Oficial' issues for group 9.
11. The 1939 color changes for the "cents" issues and all small format on the 1E3 paper. The 25c to 20 pesos issues on the 1E3 paper.
12. The 'Servicio Oficial' issues for group 11.
13. The 1940/41 issues on the 1E4 paper from 1/2c to 20 pesos.
14. The 'Servicio Oficial' issues for group 13.
15. The 15c Martin Guemes and the 20c Large Format cattle on all papers, including the 15cMG 'Servicio Oficial.'
16. The 1943 clay paper issues 1c/5c/10c and large format stamps.
17. The 'Servicio Oficial' issues for group 16.
18. The 1943 issue of the 3c Moreno on all papers.
19. The 'Servicio Oficial' issues for group 18.
20. The issues on diffuse second watermark paper (2D). I think these are only 'cents' issues (I know only of the 1/2c).