Those Adlers don't look like it to me... This one has almost a mustache curve across the top, which those don't have.
Not selling it - saw it for sale and the seller doesn't know what it is for. Just thought I'd see if I can help ID it for him. Thanks!
Henway is kinda like a 1939 Crosley Schoolbus Convertible, or a kenoter valve or a highlift flywheel.
If you insist on calling me something,,at least spell it correctly! (ornery) I prefer to call my comment humorous but call it what you like. HRP