You’re right, Charlie!
That looks to be a very interesting Trusty. In standard form as manufactured it would have been a 3-speed + reverse transmission driving through later type reduction gears (the sliding axles signify this). The engine looks to be a JAP 5 and the reversible plough is a nice addition, unusual but not a rarity. It will have been made after 1950 but if you let me know the serial number from the back of the transmission case I can narrow it down a little more and enter it onto the Trusty Register. You can access this, together with many more Trusty products, under the “Survivors” Tab at the top of the page.
Later, local additions appear to be the two toggle handles and operating rods that disappear into the rear of the transmission casing- I wonder what they do? Perhaps you’ll enlighten me! Also the wheels aren’t the standard 2-wheel tractor wheels but they bear a similarity to the ones fitted to the front axle of the Mk1 Trusty Steed, so I can’t say for certain that they are factory fitted or not; at least they’re unusual!
I’ve included a factory photo of a similar machine taken when new for comparison.
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