The 1st hydraulic unit has a Lockheed inspection stamp on it, a stylized L superimposed on an A (for Lockheed Aircraft):
The T superimposed on the H over XXX in a circle was a Heat Treat stamp used by Lockheed.
The W over xx in a circle stamp, and W over M over xx in a circle stamp, on the 2nd(the one with the green paint) hydraulic unit are also associated with Lockheed.
The part numbers 148188 & 148189(?) on the 1st hydraulic unit (probably) indicates it is from a Lockheed Model 14 Super Electra or a variant thereof that used the same parts, such as the Hudson.