Pucman: if you'd like to just take off the swivel's base and mount your wilton swivel jaw to a bench using the two holes that would work. or build a stand for it and mount the vise for 360 degree access. or find or make a replacement swivel's base which a machinist could probably make by using your broken one as one to copy. also a machinist in your area if you know one or several members make handles you can buy if you can't make one yourself.
post up your fixes on the Vise Repair 101 thread and here's the link.
http://www.garagejournal.com/forum/showthread.php?t=252830
VISES: it's good to have a little steel and some talent to make a nice stand isn't it?
WELL DONE!!
Honza: that hammer head looks a bit bigger than normal so i'd check that vise out in person. it hasn't been on that wood outside long or maybe he just put in new bolts. i can't figure out the maker, but guessing the jaw width is 5 and maybe 6 inch?