Brass Shotshell Crimp - General Ammunition Discussion

What would be correct name & time frame for the type of crimp on this Winchester 10 ga brass shotshell?

Berry's 45-70 Government (.458) 350 Gr. Round Shoulder Bullets (500) - Precision Reloading

BI-METTALIC 9MM CASES

Peterson Brass 6.5 Creedmoor Unprimed Box of 50 - Graf & Sons

What was the point of brass shotgun shells, and are they still used? - Quora

Cases covered with soot - problem? Please advice!

FC 45-70 Govt with a shotgun shell primer - General Ammunition Discussion - International Ammunition Association Web Forum

Dirty brass, seems excessive.

Ponsness Warren 900 - Sudden crimp change.

410-44 cal. ???? - The Firing Line Forums

What was the old blue shotgun shell called? - Quora

Brass Shotgun Shells