Looks more like the 90mm from Serie 77
The Americans" 90mm A/14 James D. McGeachy, 1st Infantry Division, 1966-71
But not the same gun and no bandana ...
Would be of the upmost interest when asking an identification to give informations like ... size .... material ... marking ( if any) ) this would help jus a bit to identify the maker out of the > 1500 makers past and present
What a treasure trove of nostalgia!Effectively seems to be the F20 US Speciak team Reckon Force in 80mm
see extract of colours catalogue here
https://www.mirofsoft.com/nostalgia-old-catalog-pdf/
free download