@bluegrassbrian, the number inside the castle is not the shape number. That number will tell you when the pipe was made. In 1987, they started using the Castle logo and inside was stamped the number 40, for the 40th anniversary of when they started, in 1947. So, pipes made in 2017 have 70 stamped inside the circle. Pipes made in 2016 have 69 inside the circle.
Castello almost never puts the shape number on a smooth pipe. Their view of a shape chart is that it is an approximation. Shape numbers are, today, rarely used on rusticated and sandblast pies, but they still pop up occasionally. In an earlier time, shape numbers were stamped on most rusticated and sandblast pipes. Dealers and collectors know the chart and most of the time everybody agrees that x pipe would bear y shape number, even though nothing is stamped on the pipe.
That there are no k's on your pipe is an oddity.
Castello almost never puts the shape number on a smooth pipe. Their view of a shape chart is that it is an approximation. Shape numbers are, today, rarely used on rusticated and sandblast pies, but they still pop up occasionally. In an earlier time, shape numbers were stamped on most rusticated and sandblast pipes. Dealers and collectors know the chart and most of the time everybody agrees that x pipe would bear y shape number, even though nothing is stamped on the pipe.
That there are no k's on your pipe is an oddity.