Hi Veikko1
Been reading with interest as i have just finished the saddle for my 1914, I had a very rusty frame, similar to a Brooks B170 but more lightweight, had bolt holes front and back for a pan rather than leather-in-tension, had no springs, spreader or clamp so i got to work, borrowed a friends B170 to use as a pattern, beat out a pan, welded studs in, then had to read-up about wet molding leather and stitching,
the result can be seen in the photos, and the best bit, total cost of rebuild £130 includes the leather, stitching thread and tools,steel for pan and a pair of springs picked up at Kempton Bike Autu Jumble, cost in time about 10 hours work. Well worth the effort i think.
All the best in finding your saddle, Chris