Just found these buttons. Probably a civilian blazer button.  

Here's an example, the 107th Infantry PP 107th Infantry in the 42nd Infantry Division New York New York, which makes it depending on the year this shirt was worn, 1st Battle Group 107th Infantry in the late 50s early 60s, or after 1963 either the 1st or 2nd Battalions 107th Infantry. Note the wear above the U.S. ARMY Tape, something unique to all the units of the New York National Guard in the 50s into the 80s.   The 104th Artillery by the way was in the old 27th Armored Division  by 1960, its 1st Battalion, it was assigned sometime in the late 1950s with the PENTOMIC Restructure, before that it was in the 42nd Infantry Division of the NYNG, battalion now consisting of the 1st and 2nd Battalions, the 2nd Battalion stays with theb42nd Div, the 1st goes to the 27th Armd Div. so this 104th Arty PP could of been worn on a 42nd Div shirt pre 1959 or post 59 on a 27th Armd Div shirt.

Naval aviators were officers (and warrants) so they were supposed to wear the officer version, yes.  ^https://www.history.navy.mil/content/history/nhhc/our-collections/photography/numerical-list-of-images/nhhc-series/nh-series/NH-52000/NH-52844.html  

Yup. Its converted into an old shoe shine box.

I read that the navy had these Blue Cammos because they hid dirt and grease.

I dont have it yet but they do appear embroidered. Ive never seen the sailing ship with the eagle and anchor?

The ones I have all come in a tan leather sheath and have a date of 1948 stamped on the sheath.

I have made my own DIY one and it works fine for my purposes. Looks decent as well. My “war room” is a work in progress

Hello were the Type A 1  survival  machete’s ww2 era or post ww2?  thank you

Hi Contrary to what a lot of collectors think, it is not as simple as saying flat = WWII and curved = postwar.  The 1941 regulations specified boards that were flat, however as early as the 1920s privately purchased boards were offered with a slight curve that looked more like a flat board that had the ends bent down, leaving a sort of raised crease appearance at the end. These were not flat boards the officer bent (they don't bend that easily by design).  Some manufacturers took this a step further and added a distinctive curve in an effort to provide a more pleasing shape - after all the point of the curve was to provide a better looking fit over the shoulders. Flat boards can tilt off center to the shoulder axis and look sloppy. The kinked look of the creased ones did not present the finest transition from flat to curved, so other suppliers came up with a better curved arc that was symmetrical and balanced.  While not authorized, they weren't uncommon to see. Another source of unauthorized curved boards were those made and sold in the upper end tailor shops in England & Australia.  There are numerous photos of officers wearing the curved variation of boards during the war, and that can be verified because some of the officers were KIA during WWII. In fact the first type I mention with the bent look, can be see in this photo of Admiral Dan Callaghan who was KIA in August 1942. There are plenty of photos of the better looking nicely curved boards too, I just don't have one handy at arms reach. It ultimately came down to if the officer liked the curved style, was in a command that was tolerant of them, and could find someone selling them. I have seen photos from Ensigns to Admirals with curved boards during WWII, though I would say probably the flag officers could get away with it, and not every Ensign could.  To date the boards, it really comes down to the logo, material, and size/shape. There is a bit of a curve  (no pun intended) to learning it, and at times it can seem like there is no difference at all, because the details are often the most important. The angular bent boards I mention are pretty much all WWII era, the curved ones can depend on details as some can date back to the 1920s but have a specific shape/size. The curved boards existed before the US Navy adopted them, and it was because of their popularity that they gave in and made the style regulation later - they simply gave a better fit to the uniform.  I hope that helps