Vintage Adlake Railroad Switch Lock w/Chain This switch lock is from the Central of Georgia and is an Adlake Company Lock, US Patent 2040482, Dated May 12, 1936. This Lock was forged in the 1st Quarter of 1959. The works are in good shape and when released the latch springs open with ease and speed. When you push back the cover the number 159 is reveled. The chain attached is original.