I think I was recently fooled on a repro. sinclair sign. It has a dinosaur with a sign hanging from his mouth. It has classic aging signs but the back has this slightly rough greyish look to it and some marks like it rested on something during firing. It really is bothering me since I'm seeing similar signs on ebay. It's got weight but I'm confused at this point so if anyone has any knowledge in this matter, I'm all ears.