I didn't set out to find a B.S., I was lucky, my granddad bought it for me as a 16th birthday present (25 years ago now!)
The 1907 flatbed was his, he taught me on that and got me first a super-adept, then replaced with a Simat 101 which I wish I had kept, and then the B.S. as for some things the Simat just wasn't big enough!
No idea where he got it from. I wish I knew a bit more of its history to be honest.