First an interesting look at the choreography of fighting with two Dandpata at the same time; please see 
https://www.youtube.com/watch?v=qV25-ORDeUg and imagine being in the arena trying to fight this technique.
 
Secondly a look at 
http://wallacelive.wallacecollection...ype=detailView Abraham Stamm blade on a PATA; By the way PATA means 
paw in Portuguese) ; The blade clearly marked with Stamm on one blade surface and Solingen on the reverse. 
Stamm was active between 1700 and 1729.
 
Finally, Please note ; Another 
Stamm appears at 
http://www.vikingsword.com/vb/showth...ighlight=stamm . Quite usually his blade stamp is two; 
STAMM STAMM. That may also be the case at the bolster at the throat concealing the full inscription at para 2 above..