Sorry I didn't answer before; thought I'd get an email warning if the post got answers!!
I'm brand new here..
Yeah, those are just my centerfire cartridges, classed by bullet diameters. And yes, those 2 needles are soviet underwater rounds, designed as harpoons. I got them from the SLIC, 3 years ago. They look awesome!
I tried to put more pictures, but they say I have to upgrade my membership... is that free?
By the way, always looking for new calibers to put in my cabinets, as well as new people to talk to and sell or exchange cartridges!!