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REGISTRATION STAMP - CERTIFICADO
Printed in sheets of 144 stamps, (16 rows of 9 stamps each), and exist in shades of light green. A total of 7,200 stamps were printed. It is believed that five sheets (720 copies) exist imperforate. (Scott #YF1)
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Both stamps were printed in sheets of 192 stamps, (16 rows of 12 stamps each). A total of 19,000 stamps were printed for each value. The 2c value exists in shades of violet and the 50c in shades of blue.
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Printed in sheets of 153 stamps, (9 rows of 17 stamps each), and exist in shades of red-brown. No records are available to indicate the actual number of stamps printed.