an interesting item and has caused a lot of discussion on the group forums , this was found in a local surplus store so sadly no further history or provenance.
now for the vest its self this appears to be a in country locally made SOG 1-0 vest, the originals were worn during the 67/68 period and were made from heavy canvas in Olive Drab or Khaki,
this example is clearly well-worn and has been made from a repurposed 1969 dated ERDL combat jacket, how do i know this? because the original label can be seen inside one of the many pockets
these vests would have many pockets and would have contained items such as compass, signel flares, IV tubes, maps (in the zipped inside pockets) , pistol magazines. these were mae by CISO like all other SOG procurred items.

The vest has a zip closure and then 3 leather straps that close with snaps.

im not 100% sure if this is a real incountry made piece? the cloth it period and the mixed of zips appears correct,

and if locally made wouldn't comform to known produced vests

interesting points are correct cloth, original label, it doesn't have the adjustment straps at the bottom. Just a nylon strips but the same as magazine loops, one of the inside pockets has 3 female large popers for some thing to clip in, which is very interesting and not found on originals which leads me to think its correct? but I will leave it for the buyer to make his or her mind up, as it is sold as is and shown.