As we've stated many time before, we're always happy to welcome new photos from first-time contributors! This Photo Gallery's feature photo is from first-time contributor Jon Tamkin. Jon's spectacular model is a vintage Mack H63 truck tractor that he has invested a great deal of time in. Joining Jon's Mack is another great collection from around the world; check out all the companion models in our Photo Gallery 558! [posted 03/24/2013]