This blade looks identical to one which I unfortunately got caught with (the perils of internet scammers)some time ago, except that this one is on a heer daggernot a 2nd luft. Central plane of the blade was somewhat wide with slightly rounded edges. Other than that, very convincing when assembled into a dagger. Made in spain. Bless them.
Mine looked good & the repro fittings were scarily authentic until you got it in the hand. Very heavy & made the whole thing unbalanced.
Crafty monkeys (read something defamatory) too to use a MM that is so uncommon.
Manfred I`m not stating that yours is the same type blade, just an observation that it looks very similar.