Narrow numbering (type 6).
The Thousandmark III Series with one letter is by far the most interesting typologically, with various variations associated with the printing of the
of this denomination in different printing houses.
The 29e variety is the most popular within it, but some series (e.g., T) and the presence of a "4" (closed or open) in the numerator is of
added value.
The presence of a "4" (closed) in the numerator.
