As Mark says, plus-
There is a compromise with your Tractor.
From your pictures, I can tell you that it is mainly a 1972 spec, but with 73> bits fitted (Belgium used up old stock from the U.S.
I can only see a single pedal that will operate both the Clutch and the Brake (some serious adjust is required judging by the Peddle angle).....no problem.
The main panels are 72, as the gear lever area is open and has the shorter Gear Shift decal plate.
From 73> in U.S. They fitted Seat Springs and a slightly longer (1inch) upper Steering Shaft for Knee clearance. Also the PTO Hoop set up you have is '73'>.
Dash Panel is difficult to see. A 73 wiring Loom will have a 3 position Ignition Switch, Part number 103990 . A 72 Loom was 4 position and has an Accsr'y position (101917).
So best thing to do is pop over to Redsquare via this link, which will take you to the Manuals section and you can download what you need.
You need Part/User Manuals for an 1-0311 (72 Raider 12) and Manuals for the 1-0350 (73 12-8psd) -
http://www.wheelhorseforum.com/files/category/9-1973-1977/
Ignore what is on the riveted plate on your Hood/Bonnet, in fact I would remove it.
Only thing to bear in mind is the Manuals/Parts Lists and Specs are all for the U.S. Models/Market. As far as I know, there were never any Manuals produced for Belgium Assembled variants.
So you have 2 Forums to play with, if you need any help with it.... and I have both 72 Raider 12 and a 74 12hp.