Custom Made by Willem Muijs.  This is a beautiful solid build saddle - there are no serial numbers or anything.  If it was a 16" seat I wouldn't be selling it.  Very comfortable and well made.  I rode in it twice (hoping I would be able to make it work) and it's been sitting in my tack room getting dusty for way too long.  BEAUTIFUL rose tooling.  Please feel free to ask me any questions before buying it.  I didn't weigh it but I'd guess maybe 40 pounds on it.  Really need to sell it and start looking for something different that fits me better.