You can click here or on the graphic below to call up the bigger image. What collectors call NOS, New Old Stock. This little system could be used for demonstrations, to convincingly show how simple a telephone system can be and how the telephone is an electrical instrument. I have the URL below for more info. You need to enter the product code in their search engine to locate the right page.
Hand crank rings the other phone.
Comes with translated English instructions. Wire not included, order below. I've wanted to put together this quotes and jokes page for a long time. Here's a big graphic that demonstrates all the principles . It's 120K or so but very interesting.