G'day Lachlane
The mower itself will have no significant identifying data on it from greenfield except for the serial number, which will be on to of the "U" channel that the front axle beam is nested in. It's a 4 digit number, possibly followed by a letter. It doesn't mean much as the tractor series didn't change much during its production (late 70's to mid 80's ?).
I think there is an IPC on this site if you subscribe. They didn't produce a maintenance manual.
A nice simple machine. Have fun!
Cheers,