Ontario Knife Machette- Vietnam dated Scabbard

Gents,
I just picked up a Vietnam era dated Scabbard, along with a "correct" type machete. I will post photos as they upload (form my camera).
Here is the blade to the machette..
https://www.milsurps.com/images/impo...c658472f-1.jpg

The scabbard is marked:
US
1968
MARMAC

Here is photo:
https://www.milsurps.com/images/impo...7c14286e-1.jpg

---------- Post added at 08:07 PM ---------- Previous post was at 08:03 PM ----------

More photos as I fight with Photobucket..
https://www.milsurps.com/images/impo...9fd0d6cc-1.jpg
https://www.milsurps.com/images/impo...4aac3806-1.jpg
https://www.milsurps.com/images/impo...a0bed527-1.jpg

Is this some sort of "catch" or a built in sharpener?
https://www.milsurps.com/images/impo...90122498-1.jpg

I gave $40.00 US for it... did I get beat?:confused:
It is in great condition, with the only issue is some light scratching from the belt hanger rivet rubbing on the blade.

This will make a nice pc to my Vietnam collection... if it is "correct"... what do you experts think?:cheers:

I have one just like it, but the sheath is dated 1986, and yes that is a sharpener.

Not a very good sharpener, but better than nothing. My Ontario Knife machetes are working tools. They get sharpened with a kitchen knife multi-steel-wheel sharpener which does an excellent job. There's not a better machete out there! The only problem I have with them is the rivets work loose.

Several years back someone brought out a standard looking machete except it had saw teeth on the back. The sporting goods store in our town that sold them said they got almost every one back with the blade broken. The large saw teeth gave the blade multiple places to break, and they did. The saw teeth would have been of dubious value anyway.

I also have a cheap Chinese knockoff somewhere. The scabbard is a "nylon tent like material" . overall this gear seems more substancial.
but I second on the loose rivets!
While this is probably good working kit, I intend to make this part of a 'Nam display for future generations to appreciate.