I inherited two Bandoneon from my grandfather. Both were brought over from Germany pre WWII. The “newer” of the two is an Arnold obtained by my grandfather around 1924. The other is older and is an ELA. I know they went out of business in 1910. I was hoping someone might know a bit more about these ELA bandoneon. Like approx how old it might be and maybe a value. The two are going into a museum exhibit next month and the museum would like to know how much they are worth. I can find info on the “newer” one but not the ELA.