I found one Winters sig via google that looked like it matched. The rest I saw don't. The D, K and W are the key points for comparison.
http://cgi.ebay.com/Signed-Band-of-Brothers--Winters-autographed-hat_W0QQitemZ170308412816QQcmdZViewItemQQimsxZ20090305?IMSfp=TL090305129002r8370#ebayphotohosting
I'd say 20-80 it's him.
EDIT: As a side note, there was a time in the 90's when I had to do a lot of autographing because I wrote two issues of Spawn. My co-writer, the letterer, had me create an entirely new, streamlined sig just so my hand wouldn't fall off and that it'd be readable later by the too-kind folks who wanted it. The later Winters sigs look like a sig he learned much the same way since he's been doing a million autographs since BoB.