Originally Posted by
unterhausen
I am not sure I understand what a plug-in dropout is. Internal lug? Plate style was second to squishing the blade or stays and cutting a slot for the axles. I may not know of some older lugged or plug dropouts, but I think any variant to plate or squished came much later and contemporaneously with each other with the advent of investment cast bike frame parts.
I hope someone revives Henry James. It would be hard to spend $2500 CAD on a frame without the above. Only dropouts I like, except if I may want to build for a 15mm axle.