Looks kind of like Rhodesian Anite Co chest rig, except top flap velcro is not a narrow strip and takes up whole flap area.

Sources:

https://www.sportsmansguide.com/product/index/3-new-danish-military-5-pouch-bandoliers-olive-drab?a=612582

Might not even be actual surplus: http://www.newrhodesian.ca/viewtopic.php?f=45&t=403

For original Anite Co Chest Rig, please see http://kommandopost.com/index.php/2020/02/11/anite-co-chest-rig-1980s/.