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Department :
METAL STEM & Screw thro bowl |
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Upper image presumably the earliest Kirstens, stamped 'PATS APPL FOR - S'
(Upper pipe) and 'PATS APPL FOR - M'. Neither pipe has O rings.. the S stem is 3 1/2 inch long and the M is 3 3/4 inch Centre image shows the variations on valve and bit Lower Image pats & pats pend Made in USA S stem length 3 3/4 inch pats & pats pend -L stem 4 inch pats & pats pend - A stem 4 1/2 inch, the longest Kirsten produced none of these three has any O rings |
