New challenge!!!! shell casing type???

Ok folks, I have a challenge for you. What is this shell casing? A Friend of mine gave them to me. He got them (about 150) from his grandfather

Blessed Shell, World of Horror Wiki

eXtremeRate Classic SNES Style Faceplate Cover, Soft Touch Front Housing Shell Case Replacement Kit for Xbox One Elite Series 2 Controller Model 1797 - Thumbstick Accent Rings Included

Shell (projectile) - Wikipedia

Orzly Carry Case Compatible with Nintendo Switch and New Switch OLED Console - Black Protective Hard Portable Travel Carry Case Shell Pouch with Pockets for Accessories and Games

Federal 410 Bore Ammunition Game-Shok H41375 3 #7.5 Shot 11/16oz 1135fps Case of 250 Rounds

Shell Game - (v.i. Warshawski Novels) By Sara Paretsky (paperback) : Target

Shell Game - 1st Edition/1st Printing, Douglas Terman

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Shell Casing Ring » Tiny Tina's Wonderlands » MentalMars

Full Housing Shell Cover Button Replacement for Nintendo Game Boy Advance GBA SP

Freddi Fish 3: The Case of the Stolen Conch Shell for Nintendo Switch - Nintendo Official Site

What are your opinions on fake faceplates like this? : r/3DS

GBA Nintendo Game Boy Advance Pastel Green Replacement Shell for