I have this old stove with embossed logo and writing. From what I have understood, the box is from the 1950s-1960s. There is a silent burner in the box. The question is whether this burner is as old as the box or whether it is of more recent date. Can you tell the difference between the first generation Optimus 111t and newer versions? I see that the burner shell has a slightly different attachment method than on other 111Ts I have come across.