Every word has a specific meaning but a lot of people don't seem care, to quoit the caterpillar in Alice in Wonderland "the question is who is the master you or the words". The different names for fabrics are all for different fabrics here is the answer to your question from the internet;   Though poplin is sometimes conflated with twill, poplin and twill are not woven in the same way. While twill is also a plain-weave fabric, poplin is woven with a fine warp yarn and a thicker weft yarn. While both are strong materials, poplin is often softer than twill. Poplin is also more breathable.   A lot of people don't know what something is and don't bother to look it up and just use a term they heard some where, if the material really matters to you it is best to ask for a close up picture if it. Remember google is your friend and will answer your questions but you may have to check a couple of sources to make sure they are the same.    

The pictures are vague, they do not provide much if any detail.  the information that there are no markings on the machete I consider to be a "red flag".   Myself, I would walk away.  There are going to be more opportunities to obtain a WW2 machete.  I'de use the time between now and then to get more familiar with what to look for in a WW2 machete. The search engine here is one of the places to start.  People who know a lot more than I do have written a lot about this subject.  The search engine is free!  That's not something we can say about learning about these things through trail and error.

From a different thread in this section, USS Missouri, Officer/CPO, in Grays, watching/Supervising movement of OS2U Kingfisher Scout plane. I think it’s an Officer, as he’s standing there with his hands on his hips and farther up in the photo is a CPO ( dungarees and khaki cap) actually directing. 

You probably have a Camillus that was not prepped for long term storage. Sounds like original finish.  Does the cutting edge have the "line of white", or what is the original factory edge?  SKIP

Hey @37thguy,   Bringing this thread back up - great collection! Any updates?

Courtesy of Naval History and Heritage Command 80-G-K-4562 (Color) USS Missouri (BB-63)   Shakedown cruise circa August 1944.

Hi, I'm steadily building up my collection of WWII Airborne cap badges but I'm noticing reference to 'poplin' on dealer's sites?  Is this just another term for twill or is it a manufacturer like Gemesco for instance...I'm definitely confused, any help would be brilliant.  Thanks Barry.

And I should clarify…he presented the coin to me. 

Simply lovely.   regards Herman

Courtesy of Naval History and Heritage Command 80-G-K-4528 (Color) USS Missouri (BB-63)   "Abandon ship drill on the battleships after deck, during her shakedown period, summer 1944."