In the I have had this 623 which is probably the most practical half bent bulldog I have ever seen, very nice conical chambered bowl,yet pretty lightweight and easy to clench, at least when I'm comparing with more voluminous and heavier Peterson 999 Rhodesian model. Speaking of bowl coatings, unfortunately the majority of mid-level pipes of today have this coating applied at factory even all my Stanwells have gotten it,very annoying fact,but you can always remove it using a high proof grain alcohol or isopropyl alcohol,
ps, French manufactured pipes are the ones which still often coming with no inner bowl pre-carbonation,