These two blocks are over the paper I refer to as 2D, with the straight rays diffuse watermark.
The first block is a 12c Red
The second bock is a Large Format 20c Bull (20cLC)
sitio Ingles/Español de P y R I
http://www.somestamps.com/arg3551/index.htm
sitio general:
http://www.somestamps.com/
blog de P y R I en Ingles
http://arg3551.blogspot.com/
There are 2D examples (clear, bright white paper).
sitio Ingles/Español de P y R I
http://www.somestamps.com/arg3551/index.htm
sitio general:
http://www.somestamps.com/
blog de P y R I en Ingles
http://arg3551.blogspot.com/