But what number was it?
I am unsure though if it was fully assembled at the Leeds Forge. Logically speaking, the cars were made in sections to make it easy to ship. If they were to fully assemble one car, wouldn't they have done the same with the rest of the cars?
"The Coaching Stock of the NSWGR Volume 3" might mention this. I'm not in the same town as my copy now, but the details of the early cars are pretty good.
I would expect that it was more costly to ship a complete car body, which would have to be shipped as deck cargo while the sections could be carried in the hold in the normal way. Special cranes might be needed for an assembled body, adding to the cost.
A single Melbourne "Harris" car was assembled in the UK and shipped out as a guide to the assembly of the others at Newport Workshops, some thirty years after the Leeds Forge car, so the reasons must have still applied.