About three or four years ago I bought my second Busse which was a Satin Jack. After looking through the threads I think it is what everybody calls a " husky satin jack". It has a polished spine and a flat grind with no Busse logo. I was wondering if this was the earliest version of the SJ and was there a purpose for the polished spine? Also are sterile versions military overruns and are they more collectable than ones with a logo?