Shirt: Vintage Train Tee in Gold from Zazzle (Thanks David!)
Sheldon Cooper (played by Jim Parsons) on The Big Bang Theory on CBS was spotted wearing this yellow train t-shirt on The Big Bang Theory on episode 'The Leftover Thermalization' (8x18) in Mar 2015. Sheldon's Shirt is the Vintage Train Tee in Gold from Zazzle .