As before the E1Ad number will not help as it will be the same on every tractor as it is the casting mould number. however the 1554344 indicates a June 1960 Power Major so it is possible you have a Fordson ASP (All Spare Parts) :0)
What is likely is that originally the tractor did not have hydraulics and some previous owner has fitted some from a 1953 Major.
Check for a casting code something like F21D near the clutch linkage on the side with the gearbox oil filler. This code would tell us whether it has had a new engine or just a hydraulic system.
Also where is the throttle located, Is it up under the steering wheel or down above the brake pedal?