I found about 20 of them when i was a boy in Upstate N.Y., all different cool colors too...every one had the neck/top broke off. It's just life...how it rolls.Iron pontil is on my bucket list !
Found a few (3), complete and several broken, glass pontil bottles. The iron pontil eludes me.
I have a theory that men riding on their wagons....use to strong arm iron pontils with aim....to try shatter it and something else. Perfect Long Neck Throwing bottle....fun on the wagon road.