Hello again! Hope you are doing well and I see you are still finding rather unique goodies! You have a French semi-paste (plaster wrap) doll made to resemble a gentleman from the early to mid 17th century--with a bit of "literary license" employed on the aspects of clothing and weaponry--more akin to the era of the "Three Musketeers". Most of the components appear to be no earlier than around 1920, however. The hair is likely real, by the way--again, an indication of French origins.
The character could be fictional or representative of a particular individual--difficult to tell as again, the styles are a bit mixed and not era-specific enough to pin it down.
As a curiosity and based on the size, the typical retail would be from $250 to $400 in most markets. Male doll forms are far more rare than the female counterparts, by the way, so it would do well in an advertised sale situation. The mount is newer than the doll form, as you suspect. That should not affect your value range in any manner.
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