Nice group and story, I was once part of the 5th ID myself and have always had a soft spot for their WWI and WWII history.   Scott

And his old museum will soon be bulldozed to “restore” the battlefield 

To be frank I never served for any recognition. I just wanted that GI Bill.   

Welcome aboard ! I hope you will enjoy your time with us. Lots of great people around, have fun !   Tony  

opseccc, You mentioned above " The factory acid etching is the same that many Mark ll knives of the same time frame have with an individuals personal information etched on the blade"   So true. Here's proof. Posted a photo of a 1968 Gerber MK ll in my collection below. The size and font are the same as a "SIGMA" MK ll. The #6 is also rising slighty above the other numbers like on a "SIGMA" MK ll.. BTW, Eddy Trent died Jan 17, 1969, in Quang Binh Province, Vietnam. So I'm guessing the Gerber MK ll knife was etched in Vietnam, possibly by the PX? 

I went to Gettysburg college and hung out at George Marinos’ right at the exit of Culps Hill.   Spent a lot of time on the battlefield.

Here is a shark mouth example from the 90th Bombardment squadron taken at either Nadzab or Gusap. The white tipped vertical stabilizer is a dead give away for identification.  Using Michael John Claringbould's Pacific Profiles Volume 3 for reference - This can be identified as one of two examples.   The shark mouth motif was widely used in the 3rd BG.   A-20G-20-DO Serial# 42-86766 MARKS HOPE and A-20G-20-DO Serial# 42-8626 JACKS HACK both used this roundel identifier on both the port and starboard with the names painted beneath the roundel on the port side.   *Note the additional 500lb bomb rack mounted to the starboard wing, 2 blocks of wood under each tire, and the fellow napping on a cot in between  the nose landing gear and the back left tire.   

A quick search.   https://www.ima-usa.com/products/original-u-s-wwii-inert-105mm-m84b1-leaflet-propaganda-artillery-round-with-original-transport-canister-dated-1943?variant=40484182327365

There was also “ cargo “ round that carried and dispersed propaganda leaflets.

The Culps Hill souvenir is great.