Thanks Hutch for posting the K&M case alongside your old Marbles.
I once made a shotgun shell case matchcase...I forced two 12g spent hulls over a bundle of Diamond Strike-Anywheres...using a hammer because a 12 year old with only two 12g hulls must use creativity (or at least force) to make those things "slide" over each other.
Well I can attest to the matchcase bomb effect with near smoking eyebrows.
I have been a fan of a metal "Purpose-Designed" case ever since.
If anyone is interested in the K&M cases shown above please PM me.