This mailbox on Baird Avenue in Northridge appears to be an arm salvaged from an old Bob's Big Boy restaurant. At one time there were many of these old-style coffee shops, known for their delicious burgers, throughout South California and in many other states. Today, they are few and far between. The only one left in the valley is on Riverside Drive in Burbank. Built in 1949, it is the oldest remaining Bob's Big Boy in the country.