I restored 6 or 7 StandardTwins back in the 1970's. Never had the ConvertibleTwin. The tractors I had came with the 10" Moldboard plow, disk, cultivator and sicklebar mower. The reason I liked these tractors they were all gear driven, had a multi-disc clutch that ran in oil and had a pto. I also had a Viking G I bought in
1960 for $15.00. I kept the moldboard plow when I sold the tractor I use on my Wards garden tractor. I plowed the garden with it yesterday.