Let us see that comments on your sword are technicaly constructive as you wish. However be sure that members participation yes, is certainly constructive.
I gather that you know for yourself that Juan Martinez has no longer lived in the time this sword was produced. So the mark in the ricasso is either from a different smith or a simulation; or even a Toledo (TO) mark applied by German smiths, from where your blade might have come.
This 18th century Cavalry sword model, traditionally called Boca de Caballo, basically so due to its horse mouth aspect, has a comprehensive description in the following article:
By the way, you certainly have a copy of the Palomares Nomina; a work on the marks and names of Toledo sword smiths ...