The second clay paper, from 1943, the CL1B.
The 1945-47 printings on the unwatermarked (NGR) paper, printed in four variants:
1. Upper Left, clear perforations/thin paper, 12 mm overprint.
2. Upper Right, missed perforations/medium to thick paper, 12 mm overprint.
3. Lower Left, clear perforations/thin paper, 11 mm overprint.
4. Lower Right, missed perforations/medium to thick paper, 11 mm overprint.
The final printing of the 1 peso 'Servicio Oficial' is on the second, clear so-called Straight Rays paper, the 2C. Here are back scans of the 1P2C-SO with vertical and horizontal watermark.
