I have 3.
View attachment 332211
All 3 have small (group 2-3) oval chambers. They definitely DO NOT have large(r) surface areas - just differently shaped ones
Ah, interesting, so they just take a round bowl and squeeze it down into an oval. Makes sense if the goal is to reduce printing when put into a pocket.
Your middle pipe is particularly good looking. Is that a Barling?
I can’t make out the stamping. Need to note it in my rapidly expanding PAD list.
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