This is about the only place I've found to talk about the Sedgley! I have a Sedgley carbine, three diget serial #: 31X, marked on the action, in the barrel channel and another place that escapes me at the moment.
Has a tall front sight and a lyman type sight on the barrel. Not a receiver mounted rear sight. Has a small diamond of checkering at the wrist, but it may well be a later attempt by someone else.
Stock is a shortned military stock, not a schnobel.
Have not seen another carbine like it.

Dave
daveinsvaz@gmail.com