Among the differences is the iron design. This apply to the antique design base on their country name. Belgium got Brussels Iron and Poland got the Poznan Iron. I saw it at the museum.
In the old days, they build things with the same function but distinguish it with other brand through the look. But today, same function like washing machine but with technology that other brand don’t have.
They are people who really like to collect antique iron. I only know a charcoal iron. Actually there are other type of antique iron like flat sad iron and spirit iron.
You can find out about all this iron at one of the collectors website here.
There are others who collect an old washing machine too. You will be surprise to see how washing machine look on 19th century…Go to here.