Kodak Anastigmat 127mm f/6.3 in Diomatic No. 1 shutter.  Glass is in great shape for its age, with minor cleaning marks and what looks like a streak of potential glue deterioration.  Shutter is fully functional, and includes a neat exposure calculator.  Covers 4x5" at infinity, but don't expect a wide range of movements.  Outer thread of the mount is approx. 31mm in diameter, with retaining ring and shim.