This is a 6.25" screw thru bowl style estate pipe. This is an early first generation Kirsten, marked on the left side Kirsten and on the bottom, Pats & Pat Pend-A. Bowl has a depth of 1 1/4" by 7/8" across. Very good smoked condition with wear to stem as shown.

 

Please let me know if you need any other pics or info. I combine shipping which goes out same day or next

Thanks, Rich