Pictured is older Stanwell with two smoke holes from button. Was this a short term sales gimmick also offered by other makers to deflect smoke away from tongue ? I have found no noticeable benefit, restricts airflow.
Mine passes BJ Long bristle cleaners.I think it's also called "dual bore". I have a couple pipes with this feature. It's alright if you're a "sipper". Difficult to keep clean as the hole's won't let a typical pipe cleaner through.
did we just find out more about you then we ever wanted to know?It's an unfortunate birth defect. It causes a lot of issues with aiming. It can be repaired with surgery, but the recovery is brutal.