Many thanks to Tom Seaberg of Minnesota (USA) for his extensive help in compiling the information below.

N.B. After the J.I. Case Plow Works Co. was taken over by Massey-Harris in 1928, some 20-30 and 12-20 tractors were still produced with the Wallis name on the radiator and the serial no. plate. These tractors are listed under the Massey-Harris section of the register.

Model	Serial No.	Year	Owner/Location
Bear	203	1912	Ohio, USA
Cub	1272	n/a	Western Development Museum, Saskatoon, Canada
Cub	1487	1914	Malcolm Robinson, Lincolnshire, England
Cub	1532	n/a	North Carolina, USA
Cub	1534	n/a	Minnesota, USA
Cub	1565	n/a	Minnesota, USA
Cub	1594	n/a	Ohio, USA
Cub	1624	1915	Gerhard Schumacher, Germany
Cub Junior	10078	n/a	Oklahoma, USA
Cub Junior	10645	n/a	California, USA
Cub Junior	11537	n/a	Minnesota, USA
Cub Junior	11921	n/a	Science Museum, England
Cub Junior	12162	n/a	England
Cub Junior	12405	n/a	Scotland
Cub Junior	12492	n/a	Iowa, USA
Cub Junior	12720	n/a	Ari Ojala, Finland
Cub Junior (wide-front)	13072	n/a	Saskatchewan, Canada
Cub Junior	13159	n/a	England
Cub Junior	13228	n/a	Finland
Cub Junior	13285	n/a	Oklahoma, USA
Cub Junior (wide-front)	13297	n/a	Michigan, USA
Cub Junior (wide-front)	13338	n/a	Canada
Cub Junior	13652	n/a	North Carolina, USA
Cub Junior	n/a	n/a	Finland
Cub Junior	n/a	n/a	Musee Maurice Dufresne, Azay-le-Rideau, France
Cub Junior	n/a	n/a	ITAS 'G. Garibaldi', Rome, Italy
Cub Junior	n/a	n/a	New York, USA
Cub Junior	n/a	n/a	Tennessee, USA
Cub Junior	n/a	n/a	Western Development Museum, N. Battleford, Canada
K	11823	1918	Malcolm Robinson, Lincolnshire, England
K-3	14134	n/a	USA
K-3	14387	n/a	Texas, USA
K	14587	n/a	Missouri, USA
K	14821	n/a	Pioneer Village, Minden, Nebraska, USA
K	14881	n/a	Wisconsin, USA
K	14883?	n/a	England
K	15009	n/a	Minnesota, USA
K	15357	n/a	Minnesota, USA
K	16104	n/a	Minnesota, USA
K	16969?	n/a	North Dakota, USA
K	17594	n/a	n/a
K	17984	n/a	Iowa, USA
K	18405	n/a	Mt Pleasant, Iowa, USA
K	19329	n/a	Minnesota, USA
K	19780	n/a	Minnesota, USA
K	20584	n/a	Minnesota, USA
K	21709	n/a	Indiana, USA
K	21778	n/a	Vista Museum, California, USA
K	22957	n/a	England
K	23102	1920	Malcolm Robinson, Lincolnshire, England
K	n/a	n/a	Smithsonian Institution, Washington DC, USA
OK Orchard?	23731	n/a	California, USA
OK	23984	n/a	Ireland
OK	24151	n/a	Gilbert Armour, Ladyhill, Co. Antrim, N. Ireland
OK	24236	n/a	Minnesota, USA
OK	24237	n/a	California, USA
OK	24622	n/a	N. Ireland
OK	24780	n/a	Brayshaw Park Museum, New Zealand
OK	24802	n/a	n/a
OK	25163	n/a	Minnesota, USA
OK	25392	n/a	n/a
OK	n/a	n/a	Otago, New Zealand
Certified 15-27 Industrial	25650	n/a	Minnesota, USA
Certified 15-27	36777	n/a	Indiana, USA
Certified OKO Vineyard	40038	1926	Malcolm Robinson, Lincolnshire, England
Certified OKO Orchard/Vineyard?	40046	n/a	Iowa, USA
Certified OKO Vineyard	40296	n/a	Michigan, USA
Certified OKO Orchard	40368	n/a	Heidrick Museum, California, USA
Certified OKO Orchard	40659	n/a	USA
15-27	50073	1927	Wales
15-27	50104	n/a	Oklahoma, USA
15-27	50488	n/a	n/a
15-27	50497	n/a	Missouri, USA
15-27	50841	n/a	England
15-27	50983	n/a	Iowa, USA
15-27	51113	n/a	England
15-27	51165	n/a	England
20-30	52532	n/a	n/a
20-30	52846	n/a	Minnesota, USA
20-30	52889	n/a	Saskatchewan, Canada
20-30	53197	n/a	N. Ireland
20-30	53473	n/a	South Dakota, USA
20-30	53514	n/a	Minnesota, USA
20-30	53616	n/a	Saskatchewan, Canada
20-30	54616	n/a	Missouri, USA
20-30	55038	n/a	Alberta, Canada
20-30	55445	n/a	Alberta, Canada
20-30	55559	n/a	n/a
20-30	55867	n/a	Saskatchewan, Canada