I am not any expert on ordnance but that seems too thick to be a shell casing. Seems more like a hand carved piece of brass made for export. 

Might have something to do with BIOT

It looks like a legit US M3 that was converted to a bayonet to fit the H&K G3 infantry rifle that was adopted by Norway during the cold war. Your M8A1 scabbard is a standard Norwegian made copy of the US M8A1 (note the font of the markings and the Norway "crown" property mark). The Norwegian scabbards are scarce in the US, but not rare. They will bring about $50 in good condition. The converted bayonet is not common, I think it is worth maybe $100-$150 or so. It is interesting, but not as desirable to US collectors. It might be worth a bit more to a Norwegian collector. 

Wow!! That is an awesome display!! Great work!!!

Back when dinosaurs roamed the earth, I flew C-130E Hercules aircraft in the USAF (MAC & AMC).  Fast-forward to three weeks ago, and I became caretaker of a decommissioned C-130E/H Hamiliton-Sundstrand 54H60 propeller blade.   It was in pretty bad shape when I picked it up. But with a little elbow grease, black spray paint, fresh Hamiliton-Sundstrand sticker, and a custom anodized steel base from a local metal fabricator, it now stands proudly in my office. It's a beast: 77" tall and approximately 100lbs; props to my wife for her assistance in helping me move this thing from car to sawhorses in the garage, then into the car again for the trip to the metal fabricator, then from the car indoors to the office.    Hard to believe I flew all over the planet with 16 of these things spinning just outside my cockpit windows (!).

Here are matching vases dad sent to my mom when he was in Japan before going to Korea. Don't know what size shell they are. I suppose the Japanese were making things out of surplus to sell to the G.I.s for income at that time. 1951. The artwork is pretty and they match very nicely. And judging by the crustiness inside I'd say mom used them for flowers over the years. Mark

OK this one has me stumped. It's on a Vietnam era USMC helicopter G-1 but I can't find anything on the Flying Fish or the Indian Ocean Protective Assoc. Any clues topoint me in the right direction?

I used to work at a prominent GPS company. We had a project developing self-driving farm equipment. It all worked pretty well. But one time one of our engineers was moving a big harvesting combine from one field to another along a farming road. He didn’t realize he had one of the booms extended until he knocked down three utility poles. He was far from being a young inexperienced kid. Fortunately nobody was injured.  Always keep a sharp eye out while driving, folks.  mikie

Thanks for posting all of those badges. I especially like the Fort Dodge one. Been there, done that … still have nightmares (just kidding). But from Fort (now “Camp”) Dodge, Iowa to Fort Bliss, Texas that style of badge seems to be used by the Corps of Engineers:  

Korea