This is an unidentified B-17 from the Czech Republic, below is a copy of the owner's email. Our best guess is that is a Brooks Sprinter

"Hello,
I'm sending to you snaps of my Brooks saddle (on prompt on http://www.brooksarchives.info/).

I have found it (mouldy, wet - bad repair) in my father's workshop. I suppose, that it's the Brooks B17 Champion Sprinter and it could be about 30-35 year old (my father wasn't first owner). But unfortunately during the long-time using was most of letters rubbed off from the leather and now there is visible only writing "BROOKS", so I'm not quite sure about the model.
I haven't got an original Brooks Proofide Dressing in any Czech bike-shop (they sells it only in couple with a saddle :-/). So I have left it penetrate by edible oil :-) and by any kind of leather grease and now is a perfect - like new one. It's older then me (27) and still great.
 
I would be pleased, if you should identify real model and year of the manufacture.
 
Have a nice day,
 
                                 Jan Liska, Pilsen, Czech Rep."