Marvellous piece of kit, in their day. Can't quite understand why they made it petrol/paraffin, maybe it was for a specific market, or purely to keep the price down.
If someone needed something like that, then about the only other option was a Caterpillar, which would have been considerably more expensive.
I'm guessing that bigger tractors sealed their demise. Plenty of pulling power, with far less damage to the ground.
She looks a lovely little example. She'll make a few quid.