As to the markings;
I cracked open Lenkiewicz's "1000 Marks of European Blademakers". I have no other text on the topic so this one will have to do. From the examples shown there seems such "T" has been in use in Spain from 16th to 18th century.
Also used by German makers 16th century to 17th (don't know about later, no examples listed in the text).
Earliest combination of "T" and one halfmoon in Germany seems to belong to Stamm Clemens del Rei Esperdo dated 1580 (pg.66)
Singular but similar halfmoon is attributed to Shul Jean Matheu (Hoffman?) 1600's. (pg.67)
Facing halfmoons are found on a German made sword, maker unknown, dated 1620-1630.
I hope someone has richer literature on the topic than I do and can correct or add on to what I gathered.
What makes me lean toward late 17 cenury (or perhaps very early 18th) is the cut of the mark itself, a full heavy stamp, not a contour as is usually te case in the 18th c. (please corrct me if my belief is mistaken).
I understand Wolviex leaning toward 18th c. based on the balde style, this was my thought exactly when I was purchasing this pallash.
Wolviex, I know you were joking about the executioner stuff.
Next topic should be executioner estocs
