there was only a few gas tractors of the 191OS be 4 that there was steam engines they been around since the 186OS 😊😊 this is what U done all of your work W all everyday until tractor production took off in 192OS - 195OS the tractor 🚜 😊 production line is where it changed and U could put 2 gether more tractors in a day time if U have the right 👉 😊 info U can tell how many was put 2 gether in a day's time the day and how many made that month 😊😊 most places steam engines were still used until the mid 194OS and later than that at other places and most places had changed over 2 the gas tractors then in late 194OS the diesel tractors were made made and brand new 😊🎉😊🎉 all new technology back then old school even some tractors had a pony motor on them U would start on gas and change over 2 diesel and most bulldozers were the same way then later on they went 2 straight diesel engines no pony motors then even later than that they went 2 glow plugs and block heaters 4 the engines diesel engines don't like the cold weather 😮😮 and they need some go go juice 2 get them going alot of them they remind me of the old mack diesel truck 🚚 😊 after they started and was running U couldn't see them 4 the diesel smoke 😊😊 that's the way they were when they was cold 😮😮 OMG 1 24 2O24