I was going through some recent buys and came across this nice Sears screwdriver. I did a search and couldn't fine this exact one. I am guessing maybe 1970's. It has a BF stamped on the handle and it is very well made.
Looks like a Dunlap as 3Bay suggested. Now I wonder what the BF stamp is.
http://www.ebay.com/itm/Clean-Vinta...D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
They used the same style handle on the sears hex set. http://m.ebay.com/itm/Vintage-Compa...cket-Set-Made-in-USA-/351603177936?nav=SEARCH