Spain, Reign Of Alfonso XII, Military Cancellations

I wanted to show you these three copies from Spain, Reign of Alfonso XII, SC#243, SC#244, and SC#250a, year 1879. Their strong point is the military cancellations:
The first shows the TR (center? central?) OF THE NAVY and a somewhat blurred half-shield.
The second shows COMMANDANCE, without further specification but with half a shield visible.
The last one, I'm not sure if it's a cancellation or an overprint, although I'm leaning toward the former. This copy would read (COMMANDANCE?) MILITARY OF (NAVY?)... AND... OF THE PORT OF (SANTA MARÍA?).

I have solved the third one: COMANDANCIA MILITAR DE MARINA Y CAPITANIA DEL PUERTO DE VIGO (MILITARY COMMAND OF THE NAVY AND CAPTAINSHIP OF THE PORT OF VIGO)