Hello,
Beautiful and extremely rare Mecklenburg general's helmet. Difficult to appreciate on photo. The tip is indeed a General's tip (they are special). The plate seems to me authentic, without concern.
On the other hand :
---The landkokarde is a Landkokarde for senior NCO called Portepee.(simple striated crown). It has a large 19mm central hole and is for an M91 side-post helmet.
---The rosette on this side is for a Troop Eigentum, it is not worked like the one on the other side.
This means that this helmet has been ‘manipulated’.
In terms of valuation, as this is an extremely rare helmet, and Mecklenburg is highly valued, I would say between €10 and €15,000 and it is aimed at ‘silver enthusiasts’.
However, if I were to buy it, on a personal basis, I would ask to have access to the back of the central coat of arms, to make sure that it was not a reproduction. The enamelled plates of Bavarian generals, for example, can only be identified (authentic or reproduction) by having access to the reverse. Don't forget that there are still a number of sites offering very fine reproductions, which can only be identified by having them in hand (except for an informed public). In your case, to make a fake officer's helmet, all you need to do is get your hands on a Mecklenburg Dragon officer's helmet, and add the enamelled badge to make a general's helmet.
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