We are not willing to serrate the back edge of any of our one piece models unless they are specifically designed that way (the Jereboam Mk I, Mk IV, Aviator and now the 5.5" with a sawback that we have done as an exclusive for MidWest Gun Exchange). Even though they look good, serrations have only a limited application because the length of the saw is small and the arrangement of the teeth is pretty generic (i.e. they are designed to cut most things adequately). It is necessary to thin out the back edge of the knives a bit - you will see that the Aviator has a hollow grind in the sawback area - and we are not willing to do this on other models.
Anne