Seeing how I usually hang out in the "Big Bolts" section, I almost missed this one. Nice 'ol Wrecker, you have there. Looks to have a Weld-Built Wrecker unit, on it. Here's a nice '58 1 1/2 ton, with a Manley Wrecker unit on it, here in the "Gallery".
http://www.stovebolt.com/gallery/egan_brian_1958.html I'm a Wrecker collector myself. I'm into Vintage Ernest Holmes Wrecker units.You can see my stuff here,
http://community.webshots.com/album/116208177WBeZZP