Has any agricultural person heard of a 'Jack Russel' Tractor??

Question:This may be a pre 1950 machine.

Answers:
There are a couple of tractors with the Russell name but nothing with the exact name of "Jack Russell"...

Here's a photo of the Russell Mason Tractor built in 1949;
http://www.oliverinformation.com/news/3-...

AND a photo of Russel steam-powered tractors tractor built in 1915;
http://www.tractorshed.com/cgi-bin/shed.